Answer:
to break down food into smaller , usable form
Explanation:
the stomach breaks down food into smaller, usable forms
Your nervous system guides almost everything you do, think, say or feel. It controls complicated processes like movement, thought and memory. It also plays an essential role in the things your body does without thinking, such as breathing, blushing and blinking.
B is the correct answer to your question
They are biogeochemical cycles
