Discussion
Given below are two statements Assertion (A) and Reason (R). Read the statements carefully and choose the correct codes from those given below :
(A) Raised shorelines are common along the continental and island coasts of Pacific Ocean.
(R) In these regions tectonic processes are active along the mountain and island arcs.
Answer: A
The answer is Both (A) and (R) are true and (R) is the correct explanation of (A).
Raised shorelines, old beaches and wave-cut platforms now standing above sea level, are common around the Pacific, for example in Japan, New Zealand, Chile and California.
The reason is the active tectonics of the Pacific margins. Along the mountain belts and island arcs of the 'Ring of Fire', subduction and faulting repeatedly uplift the coast, often by metres in a single great earthquake, lifting former shorelines out of reach of the sea. So R explains A, and the options denying either statement or the link are wrong.
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