Answer:
b. ATP production through cellular respiration
Step-by-step explanation:
The presence of a high number of mitochondria in a group of cells suggests that the cells are actively engaged in cellular respiration. This is because mitochondria are the cellular organelles responsible for producing ATP (adenosine triphosphate) through the process of cellular respiration. During cellular respiration, glucose and oxygen are metabolized to produce energy in the form of ATP, which is used by the cell to perform its various functions.