The shape of the population pyramid reflects the characteristics of the population. The shape of the pyramid in India is

The population pyramid of India is characterized as an 'expansive' or 'expanding' type, which is typical of developing nations with high birth rates [t1][t5]. This type of pyramid features a broad base, representing a large proportion of the population in the younger age groups (0-15 years), and a tapered top, indicating fewer individuals in the older age cohorts due to historically higher mortality rates and lower life expectancy [t1][t4]. While India is gradually transitioning toward a more stable demographic structure as fertility rates decline, its current profile remains youthful with a significant working-age population [c3][t5]. In contrast, bell-shaped pyramids with tapered tops are characteristic of constant populations like Australia, while narrow bases are typical of declining populations like Japan [t1][t2]. Therefore, the shape in the Indian context is defined by its broad base and tapered top [t1][t3].

Sources

1. [1] https://adpcollege.ac.in/online/attendence/classnotes/files/1742964516.pdf
2. [2] Indian Economy, Vivek Singh (7th ed. 2023-24) > Chapter 8: Inclusive growth and issues > Recent demographic trends > p. 259