The correct answer is: Rice cultivation.
The Imphal Valley is a valley in the state of Manipur in northeastern India. It is the most populous region in Manipur, with a population of over 2 million people. The valley is home to the capital city of Imphal, as well as several other towns and villages.
The Imphal Valley is a fertile region, and rice is the main crop grown there. Other crops grown in the valley include maize, wheat, sugarcane, and vegetables. The valley is also home to a number of tea plantations.
The Imphal Valley is a beautiful region, with a variety of landscapes, including mountains, forests, and rivers. The valley is also home to a number of cultural and historical sites.
Here is a brief explanation of each option:
- Rice cultivation: Rice is the main crop grown in the Imphal Valley. It is a staple food for the people of Manipur. Rice is grown in paddy fields, which are flooded with water during the growing season.
- Horticulture: Horticulture is the cultivation of fruits, vegetables, and ornamental plants. Horticulture is not a major industry in the Imphal Valley.
- Tea plantations: Tea plantations are a major industry in the Imphal Valley. Tea is grown in the hills surrounding the valley.
- Shifting cultivation: Shifting cultivation is a type of agriculture that involves clearing a small area of forest, planting crops, and then abandoning the area after a few years. Shifting cultivation is not a major industry in the Imphal Valley.