Question

what is the main function of the cell membrane in an animal cell?
to break down sugar and release energy that the cell can use
to control which substances enter and leave the cell
to contain the information that the cell uses for growth and activities
to make proteins

Explanation:

The cell membrane is a selectively - permeable barrier. It allows certain substances (like oxygen, water, and nutrients) to enter the cell and waste products to leave, while preventing harmful substances from entering. Breaking down sugar for energy is the role of mitochondria. Containing growth information is the function of DNA in the nucleus. Making proteins is mainly done by ribosomes.

Answer:

to control which substances enter and leave the cell