Meaning: To 'ensure' means to make certain that something will happen or be the case.

Wrong options:

• deliberate: The word 'deliberate' is an adjective meaning intentional or planned, which does not fit grammatically as a verb in this context.
• instinctual: 'Instinctual' is an adjective that describes something related to instinct, which does not serve as a verb and therefore does not fit here.
• proves: 'Proves' is a verb that indicates demonstrating the truth of something, but it does not convey the same meaning of guaranteeing survival as 'ensures.'
• contain: 'Contain' is a verb that means to hold or include something, which does not fit the context of guaranteeing survival.
• supports: 'Supports' is a verb that means to hold up or provide assistance, but it does not convey the idea of ensuring survival as effectively as 'ensures.'
• improves: 'Improves' is a verb that means to make better, which does not relate to the concept of guaranteeing survival.
• include: 'Include' is a verb that means to comprise or contain as part of a whole, which does not fit the context of ensuring survival.

Correct answer: dependent

Explanation: The term 'dependent' is an adjective that describes infants who rely on others for care and survival. It fits grammatically and contextually as it describes the state of the infants being discussed.

Meaning: 'Dependent' refers to someone or something that relies on another for support or care.

Wrong options:

• ensures: 'Ensures' is a verb that means to guarantee, which does not fit as it does not describe the state of the infants.
• deliberate: 'Deliberate' is an adjective meaning intentional, which does not describe the state of infants in this context.
• instinctual: 'Instinctual' is an adjective that relates to instinct, which does not accurately describe the reliance of infants on caregivers.
• proves: 'Proves' is a verb that indicates demonstrating the truth of something, which does not fit the context of describing infants' reliance.
• contain: 'Contain' is a verb that means to hold or include, which does not describe the state of being reliant.
• supports: 'Supports' is a verb that means to hold up or provide assistance, which does not fit as it does not describe the state of the infants.
• include: 'Include' is a verb that means to comprise or contain, which does not fit as it does not describe the state of the infants.

Correct answer: instinctual

Explanation: The word 'instinctual' is an adjective that describes behaviors that are innate or natural, fitting grammatically and contextually as it relates to caregiving behaviors that are automatic and not learned.

Meaning: 'Instinctual' refers to actions that are driven by instinct rather than conscious thought.

Wrong options:

• ensures: 'Ensures' is a verb that means to guarantee, which does not fit as it does not describe the nature of caregiving behaviors.
• deliberate: 'Deliberate' is an adjective meaning intentional, which does not fit as caregiving behaviors are often instinctual rather than planned.
• dependent: 'Dependent' is an adjective that describes reliance, which does not relate to the nature of caregiving behaviors.
• proves: 'Proves' is a verb that indicates demonstrating the truth of something, which does not fit the context of describing behaviors.
• contain: 'Contain' is a verb that means to hold or include, which does not describe the nature of caregiving behaviors.
• supports: 'Supports' is a verb that means to hold up or provide assistance, which does not fit as it does not describe the nature of caregiving behaviors.
• include: 'Include' is a verb that means to comprise or contain, which does not fit as it does not describe the nature of caregiving behaviors.

Correct answer: include

Explanation: The word 'include' is a verb that means to comprise or contain as part of a whole. It fits grammatically and contextually as it suggests expanding the concept of cuteness to encompass additional elements.

Meaning: To 'include' means to make something part of a whole or to comprise.

Wrong options:

• ensures: 'Ensures' is a verb that means to guarantee, which does not fit as it does not indicate the act of comprising or adding to a concept.
• deliberate: 'Deliberate' is an adjective meaning intentional, which does not fit as it does not convey the action of comprising or adding.
• dependent: 'Dependent' is an adjective that describes reliance, which does not fit as it does not relate to the act of including.
• instinctual: 'Instinctual' is an adjective that describes innate behaviors, which does not fit as it does not convey the action of including.
• proves: 'Proves' is a verb that indicates demonstrating the truth of something, which does not fit the context of comprising or adding to a concept.
• supports: 'Supports' is a verb that means to hold up or provide assistance, which does not fit as it does not convey the action of including.
• contain: 'Contain' is a verb that means to hold or include, which is similar but does not fit the context of expanding the concept.

Correct answer: supports

Explanation: The word 'supports' is a verb that means to hold up or provide assistance. It fits grammatically and contextually as it describes how cuteness aids parental capacities.

Meaning: To 'support' means to provide assistance or hold up something.

Wrong options:

• ensures: 'Ensures' is a verb that means to guarantee, which does not fit as it does not convey the idea of aiding or assisting.
• deliberate: 'Deliberate' is an adjective meaning intentional, which does not fit as it does not convey the action of providing assistance.
• dependent: 'Dependent' is an adjective that describes reliance, which does not fit as it does not relate to the action of supporting.
• instinctual: 'Instinctual' is an adjective that describes innate behaviors, which does not fit as it does not convey the action of supporting.
• proves: 'Proves' is a verb that indicates demonstrating the truth of something, which does not fit the context of aiding or assisting.
• include: 'Include' is a verb that means to comprise or contain, which does not fit as it does not convey the action of supporting.
• contain: 'Contain' is a verb that means to hold or include, which does not fit as it does not convey the action of supporting.