Tides behave as BLANK waves

Due to the gravitational force of the sun and the moon the tides behave as blank waves.

Explanation:

Tides waves are usually the up and down movement of waves. Tides wave formed by the gravitational force of the Earth, moon and sun. the sun and moon's gravitational force pulls up the ocean to tilts towards the earth because of this reason t the tides rise up and down. Moreover the waves in water sticks to its governing principle that 's why it makes sound