Please help me with work

Plz ! ive been stuck on this forever

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?