The correct answer is: a) Terrace farming.
Terrace farming is a traditional practice in Nagaland that helps reduce landslide risk. It involves creating a series of terraces on a hillside, which helps to slow down the flow of water and prevent erosion. Terrace farming also helps to improve soil fertility and water retention, which can make the land more productive.
Shifting cultivation, intensive agriculture, and large-scale construction are all practices that can increase the risk of landslides. Shifting cultivation involves clearing a piece of land for farming and then abandoning it after a few years, which can lead to soil erosion and deforestation. Intensive agriculture involves planting crops very close together, which can also lead to soil erosion and deforestation. Large-scale construction can disturb the natural landscape and make it more prone to landslides.
Terrace farming is a sustainable practice that can help to reduce the risk of landslides and improve the productivity of land. It is a traditional practice that has been used in Nagaland for centuries, and it is still used by many farmers today.