Question

how are waves caused....

Answer 1

Waves are most commonly caused by wind. Wind-driven waves, or surface waves, are created by the friction between wind and surface water. As wind blows across the surface of the ocean or a lake, the continual disturbance creates a wave crest.The gravitational pull of the sun and moon on the earth also causes waves.
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Answer 2

Waves are defined as transfer of energy .

Ocean waves are called mechanical waves because they travel through medium

Waves caused due to blowing wind ..

Transferring its energy to water the friction is created and the waves are formed ... size of waves depends on wind speed ,wind duration , and the area over which the wind is blowing ..

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