Who founded People for the Ethical Treatment of Animals?

People for the Ethical Treatment of Animals (PETA) was founded by Ingrid Newkirk in 1980. As an animal rights organization, PETA focuses on promoting and ensuring the ethical treatment of animals, advocating against animal exploitation in various industries such as food, clothing, and research. Newkirk has been a prominent figure in the animal rights movement, utilizing her platform to raise awareness and drive initiatives aimed at improving the welfare of animals.

The involvement of other individuals noted in the options has contributed to animal advocacy in different capacities; however, they did not establish PETA. For instance, Michael Greger is well known for his work in nutrition and public health, while Peter Singer is a philosopher who has written extensively on ethics and animal rights, and Wayne Pacelle has been involved in animal welfare but is not the founder of PETA.