This really looks like homework.
Plasmolysis is the result of exosmosis.
Diffusion is how osmosis waorks - diffusion of water
osmosis - well that's a cousin to the other two above
imbibition - does not involves osmosis - and is the absorption of water by a solid or a gel resulting in swelling, like the seed coat puffing up during germination.
From this you get your answer.
Next time consider:
1. using the homework forums
2. using the index of your text to get definitions of terms you do not understand.
This is nothing more than understanding definotions.