Meaning: 'Shallow' refers to water that is not deep, allowing sunlight to penetrate and support coral growth.

Wrong options:

• chief: 'Chief' is an adjective meaning most important, which does not describe the depth of water.
• drag: 'Drag' is a verb that means to pull something along, which does not fit the context of describing water depth.
• collect: 'Collect' is a verb meaning to gather, which does not relate to the description of water depth.
• camouflage: 'Camouflage' is a noun or verb related to blending in, which does not describe the depth of water.
• survive: 'Survive' is a verb that refers to continuing to live, which does not describe the depth of water.

Correct answer: survive

Explanation: The verb 'survive' fits grammatically as it follows the structure of the sentence, indicating what coral reefs need to do in order to thrive. Contextually, it aligns with the necessity of sunlight and warm temperatures for the coral's existence.

Meaning: 'Survive' means to continue to live or exist, especially in difficult conditions.

Wrong options:

• chief: 'Chief' does not fit as it is an adjective and does not convey an action related to coral reefs.
• drag: 'Drag' is a verb that does not relate to the survival of coral reefs in this context.
• collect: 'Collect' is a verb that means to gather, which does not fit the context of coral reefs needing to live.
• shallow: 'Shallow' is an adjective and does not convey an action, making it unsuitable here.
• camouflage: 'Camouflage' is a noun or verb related to blending in, which does not describe the action of living.

Correct answer: camouflage

Explanation: The word 'camouflage' serves as a verb in this context, indicating the action of animals blending in with their surroundings. It fits grammatically as it follows the subject 'animals' and contextually aligns with the behavior of animals on the reef.

Meaning: 'Camouflage' means to disguise or conceal oneself to blend in with the environment.

Wrong options:

• chief: 'Chief' is an adjective that does not fit as it does not describe an action performed by animals.
• drag: 'Drag' is a verb that does not relate to the action of animals blending in.
• collect: 'Collect' is a verb that means to gather, which does not fit the context of animals hiding.
• shallow: 'Shallow' is an adjective and does not describe an action, making it unsuitable here.
• survive: 'Survive' is a verb that refers to continuing to live, which does not describe the action of blending in.

Correct answer: hunt

Explanation: The verb 'hunt' fits grammatically as it follows the structure of the sentence, indicating what animals do as part of their behavior on the reef. Contextually, it aligns with the idea of animals needing to find food.

Meaning: 'Hunt' means to search for and kill animals for food.

Wrong options:

• chief: 'Chief' is an adjective that does not fit as it does not describe an action performed by animals.
• drag: 'Drag' is a verb that means to pull something along, which does not relate to the action of seeking food.
• collect: 'Collect' is a verb that means to gather, which does not fit the context of animals searching for food.
• shallow: 'Shallow' is an adjective and does not describe an action, making it unsuitable here.
• camouflage: 'Camouflage' is a noun or verb related to blending in, which does not describe the action of seeking food.