_ is a pesticide that caused serious problems for birds insects and people

Carbamates

Explanation: Carbamate insecticides have a mode of action similar to the organophosphates and, like the organophosphates, some kill birds at low doses. Carbofuran, which has been estimated to kill one to two million birds annually in the U.S., is probable the best known example.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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the endomembrane system i think