Its mostly a stylistic choice although at one points it was mostly a heat related idea. Hot air rises so having a steep roof allowed for the accumulation of hot air. It was also a good windbreaker so a collection of houses were able to stop a lot of the harsh wind from damaging things.
The Christians want to win back the holy land and the pope wishes to see the holy land under Christian rule so they set up the crusade. There was also a King's Crusade which the pope set up.
Not sure if it is right.
The Israelite were pretty powerful at that time, so they placed the Canaanites into slavery.
Answer:
Railroad crossing is one of the deadliest types of intersections.