Explanation: Urbanisation is a complex process that involves the transformation of rural areas into urban areas due to the influx of people from rural to urban areas. This process is driven by a combination of factors, including natural increase and rural to urban migration.
Natural increase refers to the difference between the number of births and deaths in a population. When the birth rate exceeds the death rate, the population grows, contributing to urbanisation. This growth can put pressure on rural areas, leading to increased migration to urban areas where there are often more opportunities for employment, education, and healthcare.
Rural to urban migration is a key driver of urbanisation. People move from rural areas to urban areas for various reasons, including economic opportunities, better access to services, and improved quality of life. Push factors in rural areas, such as poverty, lack of employment, and poor infrastructure, can compel people to leave. Pull factors in urban areas, such as job opportunities, better healthcare, and educational facilities, attract people to move.
It is important to note that urbanisation is not solely driven by rural to urban migration. Natural increase also plays a significant role, as the growing population in urban areas can lead to further urbanisation. However, the movement of people from rural to urban areas is a critical component of the urbanisation process.
Understanding the factors that drive urbanisation is crucial for policymakers and urban planners. They need to address the challenges associated with urbanisation, such as housing shortages, traffic congestion, and environmental degradation, while also leveraging the opportunities that urbanisation can bring, such as economic growth and improved living standards.
In summary, the correct answer is (D) Natural increase and rural to urban migration. These factors work together to drive the process of urbanisation, transforming rural areas into urban areas and contributing to the growth and development of cities.