Answer:
Exulting, Moses led the Israelites out of Egypt, but Pharaoh tried to ambush the Hebrews near the “Sea of Reeds.” Moses spread his hands and a strong eastern wind forged a path through the waters. As soon as Pharaoh's chariots tried to plunge after them, the waters returned and Pharaoh's army drowned
Stone mason and concrete but their concrete that they used was one of a kind but nobody knows their recipey to make it
It is primary because it is the official process of methodically collecting information about a certain topic in a specific time period