Which of the following are advantages of agro-forestry system?
I. Control of soil erosion II. Soil enrichment through litter fall III. Modifying soil texture

Correct option is D

Agro-forestry reduces soil erosion by tree cover. Litter fall adds organic matter to soil. This improves soil fertility and structure.
Soil texture is not significantly modified. Hence statements I and II are correct.
Therefore option (d) is correct.