The structure that provides internal support and protection for plant cells is the cell wall.

Animal cells do not have cell walls. Instead, they have a cytoskeleton that provides structural support and helps with movement.

Here's a breakdown:

* Cell Wall (Plants): This rigid outer layer is primarily composed of cellulose. It provides structural support, helps maintain cell shape, and protects the cell from bursting due to high internal pressure.

* Cytoskeleton (Animals): This network of protein fibers (microtubules, microfilaments, and intermediate filaments) provides structural support, helps with cell movement, and facilitates the transport of materials within the cell.

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