Answer:
they tell the reader which character is speaking at what
This made it difficult for people to cross from one side of the peninsula to the other.
Jews were slaves in Egypt
The Israelites had been in Egypt for generations, but they had become so numerous the Pharaoh freard their presence. He thought the Israelites would turn against the Egyptians so he forced them to become his slaves
The war took place in the United States and in Canada.