In museum study, a sheep farm reports reduced productivity due to parasites in bile ducts. The specimen or feature is best linked with:

Correct Answer: D

liver fluke damages livestock

Liver fluke infection by Fasciola can damage the liver and bile ducts of livestock. It has economic importance because it reduces animal health, growth, and productivity. This MCQ belongs to the Economic importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.