The way the yeast takes in the food for yeast?
Sorry if I'm wrong! I don't really know biology. I just wanted to try to help.
B is the answer and this is proven by scientific research.
you can go out side a thro an orange peel in a garden and it will degrade and become fertilizer.
Turning off the switch breaks the electrical current to the light - no supply of energy, the light goes off.
The answer is D, digestive.
