Question

respiration is the process by which animals take in ____ and release ____.
options:
photosynthesis, air
oxygen
carbon, oxygen
oxygen, carbon dioxide

Explanation:

Respiration in animals involves taking in oxygen and releasing carbon dioxide. The green option "oxygen, carbon dioxide" matches this process. Photosynthesis is a plant process, air is a mixture, and the other options don't fit the respiration gas exchange.

Answer:

The correct option is the green - colored one with text "oxygen, carbon dioxide" (the fourth option in the list of choices).