The correct answer is: DDT is an insecticide.
DDT is a chlorinated hydrocarbon that was first synthesized in 1874. It was first used as an insecticide in 1939. DDT is very effective at killing insects, and it was widely used to control mosquitoes and other pests that spread disease. However, DDT is also very persistent in the environment, and it can accumulate in the tissues of animals. This can lead to health problems, such as reproductive problems and cancer. As a result, DDT is now banned in many countries.
TNT is a trinitrotoluene, which is a yellow, crystalline solid. It is a powerful explosive that is used in military and commercial applications. TNT is also used in some industrial processes, such as the production of plastics.
RDX is a cyclotrimethylenetrinitramine, which is a white, crystalline solid. It is a powerful explosive that is used in military and commercial applications. RDX is also used in some industrial processes, such as the production of plastics.
LSD is a lysergic acid diethylamide, which is a hallucinogenic drug. It is a powerful mind-altering drug that can cause hallucinations, delusions, and other mental effects. LSD is illegal in most countries.