Question

what is the main function of ribosomes in an animal cell? to make proteins to store water in the cell to make lipids to control which substances enter and leave the cell

Explanation:

Ribosomes are the sites of protein - synthesis in cells. They read the genetic information from mRNA and assemble amino acids into polypeptide chains to form proteins. Storing water is a function of vacuoles, making lipids is mainly done by the endoplasmic reticulum, and controlling substances entering and leaving the cell is a function of the cell membrane.

Answer:

to make proteins