i believe that the answer to the question provided above is that establishing smaller ethnic communities within larger communities gives more chance for people to know each other more but this might lead to the conflict between groups.
it will have to be b for the first lol im sorry i didnt even see the other ones you ask
terrorism, as the name implies, is the act of trying to inflict terror on the opposition, usually for change. it relies on striking fear into the enemy. traditional warfare does not rely on fear and it's goals are to destroy military targets and other things that are useful o the enemy (in total war).
(hope i )