Who separated the red sea god or Moses?

Moses

The Crossing of the Red Sea forms an episode in the biblical narrative of The Exodus. It tells of the escape of the Israelites, led by Moses, from the pursuing Egyptians, as recounted in the Book of Exodus. Moses holds out his staff and God parts the waters of the Yam Suph.

The Israelites walk through on the dry ground and cross the sea, followed by the Egyptian army. Once the Israelites have safely crossed Moses lifts his arms again, the sea closes, and the Egyptians are drowned.