Catalase is an enzyme that protects human cells from damage by helping convert the toxin hydrogen peroxide (H2O2) into water (H2O) and oxygen
(O2). A student is investigating how different pH values and different
temperatures affect catalase activity. The table below shows the student's
data. Which of the following test tubes has the physical conditions most
similar to human cells?

Dis the answer and i know because i took the quiz

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.