People must work quietly or they will disturb others is this a compound or complex sentence

How dose religion today compared to the puritans idea of religion

You receive an email from an impressive-sounding stranger, professor alexander rothschild renard iii, president of the american institute for scientific political statesmen. he urges you to vote for his presidential candidate choice. this social media red flag is known as pomposity inanity superstition fanaticism

Why didn't van gogh knock on breton's door? it seemed imposing and a bit scary. it looked alarmingly middle-class. he couldn't find the door. he saw a book that he liked instead.