Which of the following is added or taken away in hydrolysis and dehydration

Hydrolysis, just by the sound of it sounds like you are adding water and dehydration is taking away water, drawing the water out of something

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.

Oi oi oi oi oi oi  i think it is true