Question

the cell membrane is a flexible outer layer that protects the cell, controls what goes in and out through selective permeability, and helps the cell communicate with other cells. selective permeability means the cell membrane chooses what can enter or leave, keeping the cell healthy. passive transport: molecules move naturally from areas of high concentration to low concentration without using energy. osmosis: a type of passive transport where water moves across the membrane to balance water levels. active transport: molecules are moved against their concentration gradient using energy (atp). what is the main role of the cell membrane? to control what enters and exits the cell to produce energy for the cell choose the correct answer.

Explanation:

The cell membrane is selectively permeable, controlling the entry and exit of substances to maintain cell health and function. It does not produce energy. Controlling water - level balance is part of its function of controlling what enters and exits. So its main role is to control what enters and exits the cell.

Answer:

To control what enters and exits the cell