I guess formal and informal refer to two types of essay - you can write a formal essay where you avoid conversational language and such and where you need to be very professional, or you can write informally where you don't have to think about such things, it is very casual.
Explanation:
a short diagram with a reasonable explanation is the best
Answer:
B. People will naturally come together when threatened by an enemy and will do whatever it takes to feel safe again
Explanation:
cause i got this answer right
