Biology

D.Active transport is the process that requires the input of energy from the cell. It moves molecules against their concentration gradient, from an area of low concentration to an area of high concentration, which requires energy, typically in the form of ATP. This process is essential for functions like maintaining ion gradients across the cell membrane, such as the sodium-potassium pump.

In contrast, the following processes do not require energy:

A.Diffusion: Molecules move from an area of high concentration to low concentration, natural...