Question

what is the main function of ribosomes in a plant cell? to store water in the cell to give strength and stiffness to the cell to control which substances enter and leave the cell to make proteins

Explanation:

Ribosomes are cellular structures that are responsible for protein synthesis. They read the genetic code from messenger RNA (mRNA) and assemble amino acids into polypeptide chains, which then fold into functional proteins. The other options describe functions of other cell components: storing water is a function of vacuoles, giving strength and stiffness is a function of the cell wall, and controlling substance entry/exit is a function of the cell membrane.

Answer:

to make proteins