Identify the step in the phases leading to muscle fiber contraction indicated by "c."

The chart or data needs to be shown to know where c is. In order to give the best response to this question, the data or the information that was given at the start of the question needs to be provided. Making the data attached would help us to make the best answer and not make an educated guess as this would be impossible.

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.