Answer:
I think the answer is B i might be mistaken though c:
Explanation:
No they cant be mechanical because then something would have to generate their rays through the inventing of a machine.
Living organisms use two major types of energy storage. Energy-rich molecules such as glycogen and triglycerides store energy in the form of covalent chemical bonds. Cells synthesize such molecules and store them for later release of the energy.
Orientation of bonds between glucose monomers.
