The objective is to order the provided agricultural regions by their proximity to the equator, proceeding towards the pole. The methodology is as follows:
- Indonesia's primitive subsistence farming: Situated on the equator, Indonesia represents the region closest to it.
- North-east India's tea plantations: Located in the northeastern section of India, north of the equator but prior to the mid-latitudes, this region follows Indonesia in proximity to the equator.
- The Prairies' commercial grain farming: This area, spanning parts of Canada and the United States, is located in the mid-latitudes, placing it further north than the preceding regions but not as close to the pole.
- Eskimo reindeer rearing: This practice is predominantly found in Arctic and Subarctic zones, significantly closer to the poles, thus making it the furthest region from the equator.
Based on this ordering, the sequence from equator to pole is: (D), (C), (A), (B).