What are the factors that brought about the occurence of tides on earth?

Question

What are the factors that brought about the occurence of tides on earth?

Answer 1

Changes in the gravitational pull of the earth due the planet moments. ( Sun & moon )

Answer 2

Moon revolves around the earth due to earths gravitational force but the moon has its own gravitational force due to this reason tides are created

Answer 3

The presence of water, and the gravitational drag of the Moon and, to a lesser degree due to its distance, the Sun.

Answer 4

The moon has a connection with tides on the earth, this is how people can predict so easily what time high adn low tides will be years in advance.