A) Practical difficulty of introducing the predator to specific areas
B) Method is less effective as compared with the use of insecticides
C) Predator does not always survive when transferred to a new environment
D) Predator develops a preference to other diets and may itself become a pest
Correct Answer: D
Solution :[d] Biological control refers to the use of living organisms like natural predators and parasites to reduce pest population and control diseases, however they may become pest as they can develop a preference to other diets.
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