building proteins breaking down wastes controlling the activities of the cell converting energy from one form into another
I gave my students this multiple choice question: Cells take in food for energy. The part of the cell that aids in digestion of the food is the lysosome. What is the main role of lysosomes in the process of food digestion?

Only one answer is correct among these 4 choices:
- building proteins
- breaking down wastes
- controlling the activities of the cell
- converting energy from one form into another

Could you tell me which one is correct?

breaking down wastes