Biology

The correct answer is: A.Cell wall

Explanation:

The cell wall is the organelle that helps plants maintain their rigid structure. It is a tough, outer layer made primarily of cellulose (in plants) and provides support, protection, and shape to the cell. This rigid structure helps plant cells resist external pressure and maintain their shape, unlike animal cells, which do not have a cell wall.

Why the other options are incorrect:

B.Cell membrane: The cell membrane is flexible and regulates what enters and exits the cell, but it does not contribute to the ...