If an area has high rainfall and steep slopes, which management will be useful?

Correct answer: Soil erosion and landslide control

The direct answer is option A, soil erosion and landslide control. High rainfall supplies a large amount of flowing water, while a steep slope makes water move rapidly downhill. Step by step: rain falls on the slope; runoff gains speed; fast water removes topsoil; saturated soil becomes heavy and weak; the slope may then experience a landslide. Useful management includes planting and protecting trees, keeping grass and other ground cover, making contour trenches or terraces where suitable, improving drainage, and using retaining or check structures safely. Option A is correct because it addresses both major dangers: erosion and landslides. Option B, leaving water conservation, is wrong because managing water remains important even in a wet place. Option C, only drought relief, is unsuitable because the immediate risks are excess water and slope failure, not lack of rain. Option D, cutting all trees, is harmful because roots bind soil and vegetation slows runoff; removing them increases erosion and landslide risk. Exam cue: steep slope plus heavy rain means control runoff, protect soil and stabilize slopes.