Final answer:
The sodium-potassium pump is an example of active transport. It moves sodium ions out of the cell and potassium ions into the cell using ATP. Osmosis, facilitated diffusion, and simple diffusion are examples of passive transport.
Step-by-step explanation:
The sodium-potassium pump is an example of active transport. This pump uses ATP to move three sodium ions out of the cell and two potassium ions into the cell. It requires energy to move substances against their concentration gradient. Osmosis, facilitated diffusion, and simple diffusion are examples of passive transport, not active transport.