Biology

The correct answer is C.active transport.

Active transport is the process that requires energy (usually in the form of ATP) to move particles across the plasma membrane against their concentration gradient (from low to high concentration). This energy expenditure distinguishes it from passive transport, which does not require energy and occurs down the concentration gradient (from high to low concentration).

Here’s a brief explanation of the other options:

A.Dynamic equilibrium: This refers to a state where the concentration of particles remains constant, but there is still movement of particles in both directions across the...