Question

which part of an onion root cell gives it a brick - like structure? vacuole cell membrane cell wall chloroplast

Explanation:

The cell wall in plant cells, including onion root cells, provides structural support and gives them a rigid, brick - like appearance. It is made of cellulose and other polysaccharides. The vacuole is for storage, the cell membrane is a flexible barrier, and chloroplasts are for photosynthesis (not present in onion root cells as they are underground and don't photosynthesize).

Answer:

C. Cell wall