Question

which homeostatic process requires energy to move particles across the plasma membrane?
active transport
passive transport
dynamic equilibrium
osmosis

Explanation:

Active transport moves particles against the concentration gradient from an area of lower concentration to an area of higher concentration, which requires energy (usually in the form of ATP). Passive transport (including diffusion and osmosis) and dynamic equilibrium do not require energy as they move particles along the concentration gradient.

Answer:

A. active transport