Explanation: Population density is a critical demographic measure that reflects the number of people living in a given area, typically expressed as the number of people per square kilometer. This measure is essential for understanding the distribution of the population across different regions and can influence various aspects of governance, resource allocation, and infrastructure development.
In the context of the 2011 census in India, the data on population density provides insights into the spatial distribution of the population across the country. Among the states listed, Arunachal Pradesh stands out as having the lowest population density. This is primarily due to its vast geographical area, which includes extensive forested and mountainous regions. The terrain in Arunachal Pradesh is rugged and challenging, which limits the number of people who can live in a given area. The state's total area is approximately 83,743 square kilometers, but its population is relatively small, leading to a low population density.
Sikkim, another state with a low population density, has a higher density than Arunachal Pradesh. This is because Sikkim, despite being a small state, has a more concentrated population due to its smaller land area. Mizoram and Manipur, while also having low population densities, still have higher densities than Arunachal Pradesh. Mizoram's population is more concentrated in certain areas, and Manipur, with a larger population and smaller land area, has a higher density.
Understanding the population density of different states is crucial for planning and policy-making. It helps in identifying areas that may require more resources for development, healthcare, and education. In the case of Arunachal Pradesh, the low population density suggests that the state may need specific strategies to manage its vast and diverse landscapes while ensuring the well-being of its residents.
In summary, Arunachal Pradesh has the lowest population density among the given options due to its vast, sparsely populated areas, which are characterized by extensive forests and mountainous regions. This information is valuable for students preparing for competitive examinations such as the UPSC and State PSC, where knowledge of demographic data and geographical features is essential.