Read the paragraph from the section "Portable Habitat." the paragraph is 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