Endosmosis occurs when a plant cell is put in

Answer: Option D

Endosmosis occurs when a plant cell is put in a hypotonic solution.
Endosmosis is the movement of molecules from a region of high concentration to a region of low concentration through a semi-permeable membrane. A hypotonic solution is a solution with less amount of solute in comparison with the other solution.
Therefore when a plant cell is put under hypotonic solution, the movement of molecules starts from the solution to the plant cell, which in turn leads to endosmosis.