Q. Cave, arch, stack and stump are landforms formed by the action of which of the following?
Explanation:
The prolonged wave attack on the base of a cliff excavates holes in the regions of local weakness called caves. When the two caves approach one another from either side of the headland and unite, they form an arch. Further erosion by waves will lead to the total collapse of the arch. The seaward portion of the headland will remain as a pillar of rock known as a stack. The Vertical pillars after being eroded results in the stump.