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. the cell membrane moves molecules using different types of transport: 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 kind of transport uses energy? choose the correct answer. active transport osmosis passive transport

Explanation:

The text describes that active transport moves molecules against their concentration gradient using energy (ATP), while passive transport and osmosis do not use energy. Passive transport is the natural movement of molecules from high to low concentration, and osmosis is a type of passive transport for water movement across the membrane to balance water levels. So the transport that uses energy is active transport.

Answer:

Active transport