Meaning: Intelligence refers to the ability to acquire and apply knowledge and skills.

Wrong options:

• experiences: 'Experiences' is a plural noun that refers to events or occurrences, which does not fit as the subject of the sentence.
• activity: 'Activity' is a noun that denotes a state of being active, but it does not specifically relate to cognitive growth in the same way as 'intelligence.'
• entry: 'Entry' is a noun that refers to the act of entering or a way in, which does not relate to the concept of cognitive development.
• reasoning: 'Reasoning' is a noun that refers to the action of thinking about something in a logical way, but it is not the overarching concept being discussed here.
• power: 'Power' is a noun that refers to the ability or capacity to do something, which does not specifically address the growth of cognitive abilities.

Correct answer: reasoning

Explanation: The term 'reasoning' is a noun that fits grammatically as it describes the cognitive process involved in intellectual activity. It aligns with the context of discussing the development of mental capabilities alongside intelligence.

Meaning: Reasoning refers to the action of thinking about something in a logical way, often leading to conclusions.

Wrong options:

• experiences: 'Experiences' does not fit here as it refers to events rather than a cognitive process.
• activity: 'Activity' is too broad and does not specifically denote the cognitive process of logical thinking.
• intelligence: 'Intelligence' is already used in the previous blank and does not fit as a description of cognitive powers in this context.
• power: 'Power' is a general term that does not specifically refer to cognitive processes like reasoning.

Correct answer: experiences

Explanation: The word 'experiences' fits grammatically as a plural noun that serves as the object of the preposition 'of.' It is contextually relevant as it refers to the accumulated events that contribute to intellectual development.

Meaning: Experiences refer to the events or occurrences that one undergoes, which contribute to learning and development.

Wrong options:

• intelligence: 'Intelligence' does not fit as it is a singular noun and does not refer to events or occurrences.
• activity: 'Activity' is too vague and does not specifically denote the events that contribute to cognitive development.
• reasoning: 'Reasoning' refers to a cognitive process rather than the events that lead to that process.
• power: 'Power' does not relate to the accumulation of events and is too abstract in this context.

Correct answer: infancy

Explanation: The term 'infancy' fits grammatically as a noun that describes the early stage of development. It is contextually appropriate as it refers to the initial phase of both human and individual growth.

Meaning: Infancy refers to the earliest stage of life, particularly in human development.

Wrong options:

• experiences: 'Experiences' does not fit as it refers to events rather than a developmental stage.
• activity: 'Activity' is too broad and does not specifically denote a stage of development.
• intelligence: 'Intelligence' does not fit as it refers to cognitive ability rather than a developmental phase.
• reasoning: 'Reasoning' is a cognitive process and does not describe a stage of development.