Question

how does atp supply energy for cellular activities?
by breaking off a phosphate group from its structure
by releasing the sugar molecule from its structure
by adding a phosphate group to its structure
by attaching itself to a glucose molecule

Explanation:

ATP (adenosine - triphosphate) has high - energy phosphate bonds. When one of these phosphate groups is cleaved off through hydrolysis, energy is released which can be used for cellular activities.

Answer:

by breaking off a phosphate group from its structure