Question

select the part whose main job is to help ribosomes make proteins. endoplasmic reticulum vacuole cell membrane cytoplasm

Explanation:

The endoplasmic reticulum helps ribosomes make proteins. It can be rough (with ribosomes attached) where protein - synthesis occurs or smooth (without ribosomes) involved in other functions like lipid synthesis. The vacuole stores substances, the cell membrane controls what enters and leaves the cell, and the cytoplasm is the jelly - like substance where organelles are suspended.

Answer:

endoplasmic reticulum