Answer the following question given this paragraph: 

The cell wall is a rigid layer that surrounds the plasma membrane of a plant cell. It supports and protects the cell. Tiny holes, or pores, in the cell wall allow water, nutrients, and other substances to move into and out of the cell. The cell wall is made up mainly of complex carbohydrates, including cellulose.


Q: What is a rigid layer that surrounds the plasma membrane of a plant cell?


A:
the cell wall