Tides are due to two bulges of water formed on the side away from the Moon and on the side of Earth closest to the Moon. Explain how the Moon's gravity field causes a bulge of water to form on the side of Earth closest to the Moon?

Question 2) Tidal energy is a renewable source of energy that produces no harmful emissions,
but it does have drawbacks that keep it from being used more extensively. Give two
of these drawbacks.