AIIMS 2019 Biology Age Pyramids MCQ Question

Option A is correct because it accurately describes the characteristics of age pyramids: an expanding pyramid (a) indicates a high birth rate and a youthful population, a stable pyramid (b) reflects a balanced birth and death rate with a relatively even distribution across age groups, and a declining pyramid (c) shows a low birth rate and an aging population. Other options are incorrect as they misclassify the types of age pyramids; for instance, option B incorrectly labels a stable population as expanding, which contradicts the demographic transition model. Understanding these classifications is essential for analyzing population dynamics and predicting future demographic trends.