Since, the options are not given the question is incomplete. The complete question is as follows:
Water movement from the side of the membrane having a lesser number of particles and greater concentration of water to the side having a greater number of particles and lesser concentration of water is termed?
a) osmosis
b) active transport
c) filtration
d) diffusion
Answer: A). Osmosis
Explanation:
Osmosis is a process which occurs in between the two solution gradients separated by a semi-permeable membrane like a cell membrane. In this process the molecules present in the solvent moves from less concentrated solution to a more concentrated solution. This is to equalize the concentration of solutes on both sides.
