The correct answer is (b), India.
India has a population density of 464 people per square kilometer, which is the highest in South Asia. Sri Lanka has a population density of 326 people per square kilometer, Nepal has a population density of 201 people per square kilometer, and Pakistan has a population density of 264 people per square kilometer.
India’s high population density is due to a number of factors, including its large land area, its warm climate, and its fertile land. India is also a relatively young country, with a median age of 28.2 years. This means that India has a large population of working-age people, which contributes to its high population density.
India’s high population density has both positive and negative effects. On the positive side, it means that India has a large workforce, which can be a source of economic growth. India also has a large market for goods and services, which can attract businesses. On the negative side, India’s high population density can lead to problems such as overcrowding, pollution, and traffic congestion.
India is taking steps to address the challenges of its high population density. The government is investing in infrastructure, such as roads, bridges, and airports. The government is also working to improve education and healthcare, which will help to improve the quality of life for Indians.