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The boundary zone of rapid temperature decrease with depth is the:
AShelf break
BPycnocline
CThermocline
DHalocline
Answer & Solution
Correct answer: C. Thermocline
1. It begins about 100 to 400 m down.
2. It is the thermocline.
3. 90 per cent of ocean water lies below it.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 13, Water (Oceans)._
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