What characteristic makes osmosis different from diffusion?

a: osmosis occurs through a semipermeable membrane. diffusion occurs through a permeable membrane.

b: net movement in osmosis is from areas of higher concentration to areas of lower concentration. net movement in diffusion occurs from areas of higher concentration to areas of lower concentration.

c: osmosis requires facilitation by an energy-carrying molecule, such as atp. diffusion requires no additional energy to move molecules across the concentration gradient.

d: osmosis is used for gases, such as oxygen and carbon dioxide. diffusion is used for water that contains salt or sugar molecules.