The layer made of cells that gives shape and rigidity to plant cells is called the cell wall.

Here's why:

* Structure: The cell wall is a tough, rigid outer layer that surrounds the cell membrane of plant cells. It's composed primarily of cellulose, a complex carbohydrate.

* Function:

* Support and Shape: The cell wall provides structural support to the plant cell, helping it maintain its shape and prevent bursting due to internal pressure.

* Rigidity: The cell wall contributes to the overall rigidity of the plant, allowing it to stand upright and grow tall.

* Protection: It also provides a protective barrier against external threats.

Let me know if you have any other questions!