Answer:
\boxed {\tt A. \ Water \ moving \ into \ the \ root \ cells \ of \ a \ plant}
A. Water moving into the root cells of a plant
Explanation:
First, let's define osmosis.
Osmosis
The movement of a solvent, usually water, through a semipermeable membrane to balance the concentration of a substance.
Since it involves the diffusion of a solvent, which is usually water. Therefore, the answer choice that involves the movement of water will be correct.
The best answer choice is A. water moving into the root cells of a plant
