Which of the following parasites is known to live in the colon?

The correct answer is whipworms. Whipworms are a type of parasitic worm that specifically reside in the colon, where they attach to the intestinal wall. Infection with whipworms can lead to various gastrointestinal issues and may cause symptoms such as diarrhea, abdominal pain, and weight loss.

Understanding the habitat and lifecycle of parasites is crucial in veterinary medicine and livestock management. Whipworms thrive in the moist environment of the colon and can cause significant health problems for affected animals. Other options, such as pinworms, lungworms, and roundworms, inhabit different parts of the body, which makes them less relevant when specifically discussing parasites located in the colon. Pinworms are typically associated with the rectal area and not the colon; lungworms primarily target the respiratory system; and roundworms can inhabit various regions depending on the species.