What happened that allowed the first organism to come out of the water to the land ?

Tetrapods evolved from a group of organisms that, if they were alive today, we would call fish. They were aquatic and had scales and fleshy fins. ... Between 390 and 360 million years ago, the descendents of these organisms began to live in shallower waters, and eventually moved to land.

They needed better transportation because people back then needed to work and go places