Answer:
1 respiration
Explanation:
Specifically, during cellular respiration, the energy stored in glucose is transferred to ATP (Figure below). ATP, or adenosine triphosphate, is chemical energy the cell can use. ... Energy is stored in the bonds between the phosphate groups (PO4-) of the ATP molecule
The Earth was first considered habitable when we discovered that it was Microbial organisms that started the process. I would go with D.