Question

Give reasons.

(a) It is very important to preserve the prey-predator chains.

(b) The single crop method can prove harmful.

Answer 1

(a) It is important to preserve the prey−predator relationship. The predator depends on the prey for its survival, and in absence of the latter, the predator will not be able to survive. This will disturb the ecological balance of nature that can lead to several harmful effects on a particular ecosystem.

(b) The single crop method can prove harmful because growing a single crop continuously on a particular piece of land can severely deplete the nutrient−level of the soil. This can eventually lead to decrease in the yield of the crop.