Plants are composed of interacting systems that carry out specific functions necessary for life. The image below shows a magnified, longitudinal section of a cinnamon tree's stem. Parts of a few of the tree's vital interior systems can be seen in this image. The vertical vessels that can be seen in the image extend throughout the tree, from its roots to its leaves. Which of the following best describes the function of these vessels?

A.
allowing movement in response to external stimuli
B.
providing rigidity and structure
C.
performing photosynthesis and cellular respiration
D.
taking in and transporting water and nutrients