Please help me. The diagram below shows the structures of a plant cell.

What is structure 1, and how does it help sustain life?

A.
Structure 1 is the cell wall, which provides structural support for the cell.
B.
Structure 1 is a chloroplast, which is the site of photosynthesis.
C.
Structure 1 is a vacuole, which temporarily stores wastes.
D.
Structure 1 is the nucleus, which is the control center of the cell.