Question

what molecule is a common energy source for living organisms?
o atp
o dna
o h₂o
o inorganic phosphate

Explanation:

ATP (adenosine - triphosphate) is known as the energy - currency of the cell. It stores and transfers energy for various cellular processes. DNA is for genetic information storage, water is a solvent and participates in many reactions but not a direct energy source, and inorganic phosphate is a component in some energy - related reactions but not the main energy source.

Answer:

A. ATP