In which example is the effect of relief on vegetation clearly seen?

Correct answer: Farming on plains and forests on mountain slopes

Direct answer: Option A is correct. Relief means the shape and height of the land, including plains, plateaus, hills, and mountains. Relief affects slope, soil depth, drainage, accessibility, temperature, and the way people use land. Plains are usually flatter and easier to cultivate, so farming is common there. Mountain slopes may be steeper and less suitable for large-scale ploughing, while natural forests can remain or grow where conditions and conservation permit. Option A clearly compares farming on plains with forests on mountain slopes and therefore shows relief influencing vegetation and land use. Option B is wrong because vegetation differs with height, slope, climate, and soil. Option C is wrong because wheat cannot normally be cultivated in the sea; it needs land, soil, water, and suitable temperature. Option D is wrong because cities are mainly built areas and do not contain only natural forests. Exam cue: compare flat plains and sloping mountains.