The variable is y and y=2.
I'm pretty sure they are talking about the revolution of the moon orbiting the Earth. (Which is going counterclockwise) I'm not 100% sure though.
Answer:
The sea affects the climate of a place. Coastal areas are cooler and wetter than inland areas. ... In the summer, temperatures can be very hot and dry as moisture from the sea evaporates before it reaches the centre of the land mass
The answer is friction. As ocean wave approach the shoreline, they are affected by the sea bed through process such as refraction, shoaling, bottom friction and wave-breaking. However wave breaking also occurs in deep water when the waves re too steep. If the waves meet major structurer or abrupt changes in the coastline, they will be transformed by diffraction.
