Carol is enjoying eating her dinner. while eating, she notices that her saliva secretion is higher than normal and that she feels good and relaxed. what causes this relaxed state?

Ithink the answer would be f but i couldn’t really see the diagram clearly

From a high concentration to a low concentration.

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.