Final answer:
Malathion is the least persistent chemical in the environment among the options provided.
Explanation:
Malathion is the LEAST persistent in the environment among the options provided. Malathion is an organophosphate insecticide that has a shorter residence time in the environment compared to other chemicals like lead, DDT, and mercury. While malathion is more poisonous than some insecticides, its lower persistence means it does not accumulate in the environment or undergo bioaccumulation.
Learn more about environmental persistence of chemicals here:
https://brainly.com/question/38941546
