The correct answer is: B. 1000-1500 m
The mid-hill soil zone is found at an elevation of 1000-1500 m. This zone is characterized by a temperate climate with warm summers and cool winters. The soil in this zone is rich in organic matter and is well-drained. This makes it ideal for growing a variety of crops, including rice, wheat, and maize.
The other options are incorrect because they do not fall within the elevation range of the mid-hill soil zone. Option A is too low, while Option C is too high. Option D is also incorrect because it includes the high-hill soil zone, which is found at an elevation of 1500-3000 m.
The mid-hill soil zone is an important part of the global ecosystem. It provides habitat for a variety of plants and animals, and it plays a role in the water cycle. The soil in this zone is also a valuable resource for agriculture.