PLEASE HELP ME HERE Explain where the 12 tribes of Israel come from and why did they leave Egypt? (Site 2)

The 12 tribes were originated from the sons of Jacob of his two marriages. They call themselves the Israelites. In the 3rd century BC, Palestine fall under control of Egypt, and the Israelites became slaves until they were freed by Moses.

Explanation:

Each tribe takes the name of a son (six from Jacob's first wife Leah, and six from his second wife Rachel). Lately, they would be called as The Sons of Israel. They lived in Palestine until Egypt took control of the territory and because of the huge population of the Israelites, they became slaves. When the Israelites increase their population in Egypt, the Pharao decided to kill all the primogenitors. During this period, Moses was saved by the Pharao's wife, and later, Moses will become the messiah of the Israelites.