Discussion
Match the following :
| List-I | List-II |
|---|---|
| (a) Retrogradation | (i) Shoreline moves oceanward |
| (b) Groin | (ii) Wall of embankment built at right angles to the shoreline |
| (c) Progradation | (iii) Undertow |
| (d) Backwash | (iv) Shoreline moves landward |
Answer: D
The correct match is a-iv, b-ii, c-i, d-iii.
- Retrogradation: the shoreline retreats, moving landward, through erosion or rising sea level (iv).
- Groin: a wall or embankment built at right angles to the shore to trap sand moving by longshore drift (ii).
- Progradation: the shoreline builds out, moving oceanward, through deposition (i).
- Backwash: the return flow of water down the beach after a wave breaks, related to the seaward undertow (iii).
Options pairing retrogradation with 'oceanward' swap it with progradation, and the option pairing the groin with oceanward movement confuses a structure with a process.
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