Why do waves occur? And why are they important? If you help me I’ll help you with 90 points thank you

Waves transmit energy, not water, and are commonly caused by the wind as it blows across the ocean, lakes, and rivers. Waves caused by the gravitational pull of the moon and the sun are called tides. The ebb and flow of waves and tides are the life force of our world ocean.

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is