The sea is an active agent of gradation in coastal areas.
Answers
The sea is an active agent of gradation in coastal areas.
When the waves of the seas strike the coast then they result in erosion and start to wear off the rock away.
If a rock is soft then it will erode faster as compared to hard rocks such as wave-cut platforms, cliffs, bay gulfs, etc.
On receding the particles that are eroded will settle down.
Sea is an active agent of gradation in coastal areas as they perform the function of transportation, erosion and deposition. They remove the weathered material, transport it from the elevated ground and the deposit the same into low lying areas.
EXPLANATION:
Alternating up and down movements of ocean water is known as waves. The frictional pull in the waves is triggered by the wind, and when the wind is stronger, the waves are too stronger.
Like other agents of gradation, waves perform erosion, transportation and deposition. When the waves hit the coast they cause erosion and erode the rocks.
The soft rocks get worn out much quicker than 'hard rocks' and different features like the bays, cliffs, gulfs, etc. are formed. When the waves are at ebb they transport the worn out particles such as silt, sand, stones, pebbles, stones, and so on and deposit them in those areas.