Before revision: Tides are the rise and fall of sea levels created by the combination of the gravitational forces of the Moon along with the sun (the sun just in a much lesser extent) and are also caused by the Earth and Moon orbiting each other.
After revision: Tides are the rise and fall of sea levels created by the combination of the gravitational forces of the Moon along with the Sun (the Sun just in a much lesser extent) and are also caused by the Earth and Moon orbiting each other.