A) Rotenone
B) Pyrethrum
C) DDT
D) Humulin
Correct Answer: C
Solution :
DDT is the most hazardous, non-biodegradable insecticide, which is fat soluble but insoluble in water. It persists in the environment for a very long period. Being fat soluble, it accumulates in the animal tissues and gets concentrated at different trophic levels of food chain. It each step, DDT, o is moe concentrated. This is also called biomagnification.
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