Answer:
Autotrophs
Explanation:
Ex. Plants (Autotrophs) gain energy from the sun and turn it into and produce oxygen (Chemical energy)
The brain stem is the answer that you are looking for
You don't have to wait for the crops to grow on their own
Enzymes <em><u>act as catalysts in Chemical reaction of cells. </u></em>And they <u><em>can lower the required activiation energy for reaction in living organisms. </em></u>
