Depending on what your religious beliefs are there are many different sayings of how the Earth was created. Most people believe the Earth was created by God, Allah, or Yahweh. Most scientists believe the Earth was created by a huge explosion we now call the Big Bang Theory.
Some believe that Earth was wholeheartedly created as a work of God(s) or another supernatural deity. Others believe that the universe, not necessarily Earth, was created by a concept known as the Big Bang. Neither of these theories have been proven.