Final answer:
The tapeworm living in a dog's intestines is an example of parasitism, where the tapeworm benefits and the dog is harmed.
Step-by-step explanation:
The tapeworm living and feeding in the intestines of a dog is an example of parasitism, which is a type of symbiotic relationship. In parasitism, one organism benefits while the other organism is harmed. The tapeworm benefits by obtaining nutrients from the dog's intestines, but the dog is harmed as the tapeworm consumes its nutrients and potentially causes health issues.
Learn more about Symbiotic relationships