Match the following erosional landforms with their respective characteristic features:
i. Sea cave | a. Steep rocky coasts rising vertically above the sea water |
ii. Sea arches | b. Hollowed out rocks formed by the action of sea waves |
iii. Sea stacks | c. Sea caves with openings on both sides |
iv. Sea cliff | d. Isolated wall-like structures created by the thrashing action of sea waves |