Question

what is the main function of the mitochondria in an animal cell?
to facilitate cell division
to control which substances enter and leave the cell
to break down sugar and release energy that the cell can use
to give structure and organization to the cell

Explanation:

Mitochondria are the power - houses of the cell. They perform cellular respiration, breaking down sugar (glucose) through a series of chemical reactions to release energy in the form of ATP that the cell can use for various processes.

Answer:

to break down sugar and release energy that the cell can use