Match each excerpt to its text structure below.

1. In fact, Phelps's body is quite unusual. The best swimmers tend to have long
torsos and short legs. Phelps is 6 feet 4 inches, but his torso is as long as what
you would expect to see in a man who is 6 feet 8 inches tall.
2. Like rabbits, all organisms, including people, adapt to their environments. The
process of evolution selects for the survival of organisms that thrive in their
specific environments. But evolution isn't engineering.
3. Our knees are a compromise that allow us to be bipedal. More recent ancestors
of humans lost the ability to make vitamin C, but we figured out a way to solve
this problem with a change in diet
4. Humans' primate ancestors grew bigger jaws than we do, because they ate
tougher foods. Now our teeth are crowded.
A. cause/effect
B. compare/contrast
C. description
D. problem/solution
E. sequence

1. description

2. cause/effect
3. problem/solution
4. compare/contrast