Answer:
A.) Vacuoles
Step-by-step explanation:
A.) is correct because vacuoles are responsible for the storing nutrients, water, and waste.
B.) is incorrect because chromosomes are made primarily of condensed DNA. They exist to make DNA separation during nuclear division more efficient.
C.) is incorrect because the mitochondria is where cellular respiration takes place. This process is necessary for energy production.
D.) is incorrect because cell membranes do not store things. Rather, the cell membrane protects the inside of the cell, allows for the existence of a fixed environment inside of the cell, and facilitates the movement of molecules that wish to enter or leave the cell.