Read the paragraph from the section "Portable Habitat." [paragraph down below] Divers' bodies need to adjust to the changing water pressures from the deep ocean to the sunny surface. Usually,
this means divers "hang out" at different stops on a "shot line" descending from the surface.

Why did the author include this paragraph in the article?
a
to illustrate the reason Lombardi invented a portable habitat
b
to introduce the idea that diving can be a dangerous job
c
to emphasize the effects of water pressure on divers
d
to elaborate on activities divers enjoy doing while underwater