Layer Z is found at a depth of 50 to 2,900 kilometers (km) inside Earth. What is Layer X called and where is it found? A. It is the core, and it is found less than 50 km below Earth’s surface.
B. It is the crust, and it is found less than 50 km below Earth’s surface.
C. It is the core, and it is found more than 2,900 km below Earth’s surface.
D. It is the crust, and it is found more than 2,900 km below Earth’s surface.

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.

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