Question

Which force is responsible for the formation of sides in the sea

Answer 1

The force or gravity from the moon is responsible for tides mostly. It is strong because of the short distance to the moon. Gravity being an attractive force means that the moon pulls the water towards itself, so it is dependent on the moon's position where the tide is attracted.

Answer 2

Gravity is one major force that creates tides. In 1687, Sir Isaac Newton explained that ocean tides result from the gravitational attraction of the sun and moon on the oceans of the earth (Sumich, J.L., 1996).