Answer:
A. Contour
Explanation:
Contour planting is a farming practice that helps reduce or prevent soil erotion through, the planting of crops along the contour.
A contour is are lines developed across a slope at the same level of elevation of the slope. A slope referes to land which slants downwards.
The contours prevent the free flow of rain water down the slope, hence trapping soil particles that would otherwise erode. They also reduce the speed with with running water, goes down the slope.
