Growing up, Bernardo would sometimes get headaches. Whenever he got a headache, his mother let him stay home from school. Now, as an adult, his headaches have become more frequent. His head pounds any time he is required to do something he would rather not do. What kind of theoretical explanation for conversion symptoms is this?

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The salt in the sea water dehydrated the sailor because her body could not take in the amount to salt in the sea water

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.