Which letter indicates a region of low pressure in the diagram below?

A. A
B. B
C. C
D. D

Is it considered muscle s ennervation if sympathetic fibers innervate the vessels within the muscle?

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

This is the process of making a prediction based on the results of prior observations of similar events.