Population aging is a demographic trend observed in Telangana, meaning:

Increase in the proportion of elderly
Decline in birth rates
Longer life expectancy
All of the above

The correct answer is D. All of the above.

Population aging is a demographic trend observed in Telangana, meaning that the proportion of elderly people in the population is increasing. This is due to a combination of factors, including declining birth rates and longer life expectancy.

Declining birth rates mean that there are fewer children being born each year. This is due to a number of factors, including economic development, urbanization, and changing social norms. As a result, the population is aging as the number of elderly people increases relative to the number of children and working-age adults.

Longer life expectancy means that people are living longer than they used to. This is due to advances in medical care and technology. As a result, the population is aging as the number of elderly people increases relative to the number of children and working-age adults.

Population aging has a number of implications for Telangana, including an increase in the demand for healthcare and social services, a decrease in the workforce, and a change in the political landscape.

The government of Telangana is taking steps to address the challenges of population aging, including investing in healthcare and social services, promoting economic development, and encouraging immigration.