What is it called when a molecule uses energy to move across a semipermeable membrane?

a. diffusion
b. active transport
c. passive transport
d. osmosis

Active Transport

Explanation:

The movement of the particles across membrane needs energy. Energy is required in the condition where there is a movement of particles from a lower concentration to higher concentration.

It requires cellular energy for the movement of the particles. The larger molecules needs energy to move across concentration gradient.

carbon atoms, hydrogen, oxygen, and nitrogen.