Abdominal breathing is a condition in which only the inferior half of the lungs can be seen expanding and contracting with each breath. Which of the following would cause abdominal breathing?

Damage to the nerves that control the diaphragm
Damage to the nerves that control the rib muscles
Damage to the medulla oblongata
Damage to the respiratory center

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.