Discussion

Match the following :

I	II
(a) The flat accumulation of sand on a beach above the high tide line	(i) Beach drift
(b) A wave that is unstable and collapses at the shoreline	(ii) Breaker
(c) A steep wave that moves upriver during the flooding tide	(iii) Berm
(d) Net drift of sand along a zig-zag path on the beach	(iv) Bore

Answer: A

The correct matching is (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i).

The flat accumulation of sand above the high tide line is a berm.
A wave that becomes unstable and collapses at the shore is a breaker.
A steep wave front that travels up a river on the flooding tide is a tidal bore.
The zig-zag movement of sand along the beach, up the beach obliquely with the swash and straight down with the backwash, is beach drift.

Option B swaps breaker and bore, option C starts with beach drift for the berm, and option D swaps bore and beach drift.

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