hich statement should be revised for a more formal tone?

Greek mythology was created as a way for ancient people to explain the world around them.
Roman mythology was comparable in many ways to Greek mythology, although different names were used.
Poseidon, the coolest of the Greek gods, ruled the seas with his awesome tri-tip fish spear.
The story of Persephone’s capture by Hades was used to explain the annual change of seasons.