Answer:
it is, Cardiovascular
Explanation:
New study says cycling 30 miles per week cuts heart disease and cancer risk in half.
Going to movies, dances, or other events in a group is a good idea for teenagers because, all of the above.
All of the options listed are positive effects towards the teenagers, which make them safe in the situation. Going out with friends does remove the expectation of sexual activity, can reveal a lot about a person, and allows others to get to know each other.
