Aside from the milestones, Louis Armstrong achieved as a jazz soloist which made him the most influential musician in the music's history, his success can be mainly attributed to the "engaging" personality he has. He was idolised by his jazz fans mainly because he wants to be seen as more of an entertainer.
Cohabitation is living with someone or having a relationship without being married. Generally speaking, you will have fewer rights if you're living together than if you're married.
Here are two: it attracts people via tourism which helps economy, and supplies power with its rushing water via hydropower. Hope this helped for at least 2/3 of your assignment.