vocabulary

3. an important topic or problem for debate or discussion.
5. breathe in
7. start to deal with (something) in a certain way, to get closer
9. a line or border separating two countries.
10. group of states or countries under a single supreme authority
12. something one accepts as true or real; a firmly held opinion or conviction.

1. of first importance; main.
2. a combustible black or dark brown rock
4. free from outside control
6. a quantity of a medicine or drug
8. gradually grow faint,lose or cause to lose color or brightness.
11. talk with excessive pride and self-satisfaction about one's achievements, possessions, or abilities.