Active transport is different than passive transport in that:

A. active transport requires energy.
B. active transport requires energy and moves water across the plasma membrane.
C. active transport moves molecules down a concentration gradient and occurs spontaneously.
D. There is no difference between active and passive transport.

The correct answer is: A. active transport requires energy.

Explanation:

Active transport can be defined as the physiological process by which molecules are enforced to migrate from a region where their concentration is low to a region where their concentration is high across a semi-permeable membrane. This occurs by the expenditure of energy. This type of movement is usually carried out by the integral membrane transport proteins or carrier proteins those remain interspersed across the plasma membrane.Passive transport can be defined as the physiological process in which no energy expenditure is required. This is because in this form of transport, molecules move from a region where their concentration is high to a region where their concentration is low, that is, down the gradient of their concentration, across a semi-permeable membrane. This type of movement can be mediated by simple diffusion or with the help of membrane transport proteins.