Answer:
Carbohydrate is the macromolecule components of food.
The answer is B. <span>They build in the population over time. </span>
Answer:
Oxygen burns the food within their bodies and releases energy for various activities and thus it helps animal to be alive. to use it in respiration. Animals need oxygen (O) to survive. In fact, all organisms need oxygen to complete the process to burning glucose for fuel.
Explanation:
