What Causes the ‘Tides’ and How Do They Affect Life?

Imagine the Earth is like a giant ball of water, and the Moon is like a strong friend who gently pulls on it. When the Moon pulls on one side of the Earth, water rises up, that's a high tide. On the opposite side, water also rises because it’s being pulled away, another high tide! In between, the water goes down, that's low tide. This pulling happens twice a day, and it helps creatures like crabs and seaweed live in the ocean.