(a) The shape of the pyramids reflects the growth status of the population.
• The pyramid A represents an Expanding population. It is observed in developing countries like India, Brazil, etc.
• The pyramid B represents a Stable population. It is observed in countries like USA.
• The pyramid C represents a Declining population. It is observed in countries like Japan.
(b) Population having large number of young members grow rapidly, while, the population bearing more number of post-reproductive members tends to be declining is good for human population. Therefore, the pyramid A is ideal for human population.
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