How does a termite benefit from microbes inside of their digestive system?

The relationship between the termites and the microbes is a mutualism, because both species benefit from the relationship. The termites masticate the wood to mechanically break it down, and the microbes chemically digest the wood into smaller molecules that the termites are able to absorb and utilize.

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.