The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to a) simple diffusion b) a process that requires energy from the cell c) active transport d) facilitated diffusion e) cotransport.

The answer is a) simple diffusion.

Explanation:

Osmosis is more similar to simple diffusion due to the fact that it doesn't require a protein or channel to facilitate its movement through the membrane. Also, it doesn't require any energy, but it does mostly depend on a chemical, or sometimes electrical, gradient.