Final answer:
The Environmental Protection Agency (EPA) is the regulatory agency that oversees the development and approval of animal topical pesticides. The EPA administers the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and registers all pesticides legally sold in the United States b) EPA (Environmental Protection Agency).
Step-by-step explanation:
The regulatory agency that oversees the development and approval of animal topical pesticides is the Environmental Protection Agency (EPA). The EPA administers the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and registers all pesticides legally sold in the United States.
Unlike the FDA (Food and Drug Administration) which primarily focuses on human food and drugs, the EPA is responsible for regulating chemicals and substances that may have an impact on the environment and public health.
Therefore, the correct option is B. EPA (Environmental Protection Agency).