The process by which water moves across a cell membrane is called

a. Osmosis

b. Exocytosis

c. Resolution

d. Active transport

Osmosis is the phenomenon which is responsible for the movement of water molecule across the semi permeable membrane. Exocytosis is the movement of water in outward direction from the cell. Active transport is the movement of water molecules across the semi permeable membrane with the involvement of energy.

a) is the correct answer