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Study the age pyramids 'A', 'B' and 'C' of the human population given below and answer the questions that follow :
Post-reproductive
Reproductive
Pre-reproductive
(a) Identify pyramids 'B' and 'C'.
(b) Write the basis on which the above pyramids are plotted.

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answer is 1.

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Detailed Solution

a) B: This is an urn-shaped pyramid. The population depicted by this pyramid is stable.
C: This population is declining.

b) The pyramids are classified according to the age of population. This is called age pyramid.

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