Why do teens emotions change so often?

The reason a teenagers emotions change so much is due to their body growing and is close to completely maturing resulting in a rise in hormones which take time for the body to adjust to. To follow this, many teenagers suffer from anxiety and depression which also result in mood swings etc.

i would say that these are the two thesis statements best for a literary analysis essay on recurring themes in shakespeare's romeo and juliet:

1.  in romeo and juliet, shakespeare demonstrates that love comes in a variety of forms, be it romantic, familial, or between friends.

2.  shakespeare explores the struggle for identity through the character of juliet in his play romeo and juliet.

the other theses aren't reoccurring in this play. 

explanation: