Answer:
A. Carbohydrates are used to store energy and provide structure/support in living things.
Explanation:
The four primary functions of carbohydrates in the body are to provide energy, store energy, build macromolecules, and spare protein and fat for other uses.
In the light reactions, H2O goes in, and O2 goes out.
Because if you come across something surprising, it's best to know how and why that happened
volume of a sphere=(4/3)πr³