Biology

The correct answer is A.Carbon dioxide.

Here’s why:

Animals release carbon dioxide (CO₂) during the process of respiration. When animals breathe in oxygen and break down food for energy, they produce carbon dioxide as a byproduct, which is then expelled into the atmosphere.

Plants depend on carbon dioxide for survival, as they use it during photosynthesis. In photosynthesis, plants absorb carbon dioxide from the air, along with water, and use sunlight to convert these into glucose (a form of sugar) and oxygen. This process is vital for plants to produce food and for oxygen to be released into the atmosphere, which animals then rely on for respiration.

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