under drug use are sentences 1 and 3. Under drug misuse are sentences 6 and 2. And under drug abuse are sentences 4 and 5.
Explanation: drug abuse is classified as using illegal drugs or doing legal drugs when one is just underaged. Drug use is when the person with the drugs is using them correctly and safely. Drug misuse is when a person has prescription medicines and take too high of dosages or use them for the wrong purposes.
