Read the paragraph.
The government relies on scientists to help it decide whether a species is
endangered. Scientists study animal populations. In each study, they look at
possible threats to the animal. These threats include hunting, disease, loss of
land, and loss of food sources. If any of these threats are present, the animal
could be in trouble. Scientists watch these animals, keeping track of their
populations over time.
How does the author’s use of the paragraph add to the building of information in
the article?