Final answer:
A person working at the FDA might be responsible for investigating the effects of various substances like drugs and agricultural chemicals on animals, part of the FDA's overall role in ensuring public health safety and the efficacy of pharmaceutical drugs.
Step-by-step explanation:
One of the responsibilities of someone who works at the FDA (Food & Drug Administration) may include investigating the effects of drugs, antibiotics, and agricultural chemicals on animals. This falls under their mandate to ensure the safety and efficacy of pharmaceutical drugs and veterinary products, among other things. The process of drug approval is rigorous and involves several years of testing, including on animals, before a drug can be approved for human use to ensure that it is not harmful and effectively treats the condition for which it is intended. By overseeing these processes, the FDA plays a crucial role in protecting public health.