The correct answer is: a) Shifting cultivation.
Shifting cultivation, also known as swidden agriculture, is a traditional agricultural system in which farmers clear a piece of land by cutting and burning the vegetation, then plant crops for a few years. After the soil becomes depleted, the farmers move to a new area and repeat the process.
Shifting cultivation is a sustainable agricultural practice when it is practiced in a way that allows the land to recover between uses. However, when it is practiced too frequently or on too large an area, it can lead to deforestation and soil erosion.
In Manipur, shifting cultivation is still practiced by some communities, particularly in the hills. It is an important part of the local culture and economy. However, the practice is also under threat from deforestation and development.
The other options are incorrect because:
- Intensive agriculture is a type of agriculture that uses large amounts of inputs, such as fertilizers, pesticides, and irrigation, to produce high yields. It is not a traditional agricultural practice in Manipur.
- Pastoralism is a type of agriculture that involves raising livestock. It is not a traditional agricultural practice in Manipur.
- A mixed economy is an economy that includes a variety of economic activities, such as agriculture, industry, and services. It is not a traditional agricultural practice in Manipur.