Read the passage.

Many high school students enjoy working out. Some students enjoy sports, while others exercise independently. Running, swimming, and dancing provide great workouts. By the teen years, bodies are mature enough to add weight training. Lifting weights increases strength and improves coordination and balance. Weight-lifting routines must be planned carefully to avoid strain and injury.

Which detail explains the benefits of weight training?

Many high school students enjoy working out.
By the teen years, bodies are mature enough to add weight training.
Lifting weights increases strength and improves coordination and balance.
Weight-lifting routines must be planned carefully to avoid strain and injury.

Many high school students enjoy working out. Some students enjoy sports, while others exercise independently. Running, swimming, and dancing provide great workouts. By the teen years, bodies are mature enough to add weight training. Lifting weights increases strength and improves coordination and balance. Weight-lifting routines must be planned carefully to avoid strain and injury.

Explanation:

the answer is: round.

in literature, round characters are considerably complex and experience or are subjected to unpleasant situations. as a consequence, they go through crucial sentimental and psychological development, which can cause surprise in the readers. in this case, juan's dramatic transformation is related to the adversities he meets at school.