Question

which indicator suggests that a teen may be abusing drugs?
loss of friends
being on time for curfew
missing one school assignment
volunteering for extra chores at home

Explanation:

Drug - abusing teens often experience social changes. Loss of friends can occur as their behavior and priorities shift due to drug use. Being on - time for curfew, missing one school assignment, or volunteering for extra chores are not typical indicators of drug abuse.

Answer:

loss of friends