Animals breathe oxygen and give out carbon dioxide.(a) True(b) False

The statement "Animals breathe oxygen and give out carbon dioxide" is:

(a) True

Explanation:
Most animals, including humans, rely on oxygen for their survival. When animals breathe, they take in oxygen (O₂) from the environment, which is transported to their cells for cellular respiration.
During cellular respiration, oxygen is used to break down glucose (or other nutrients) to produce energy (ATP), and as a by-product of this process, carbon dioxide (CO₂) is formed.
Carbon dioxide is then transported back to the lungs and exhaled as a waste product.
Thus, animals breathe in oxygen and give out carbon dioxide, making the statement true.