Adolescence is a critical stage of development for humans. most people associate adolescence with physical changes, but there are also emotional changes that preteens and teenagers experience during this time. describe the emotional changes you noticed in someone you know. < < read less

Since most people experience adolescence, I have notice for the people I know that aside form physical change they also experience emotional change like the below:

Feeling overly sensitive
Looking for an identity
Feeling uncertain
Peer pressure
Conflicting thoughts
Mood swings
Feeling conscious about self
Getting sexual feelings

All of the mentioned are just normal for people on the adolescence stage.  

Ithink it's choice d (antibiotic resistance)