ANSWER:
The answer is D- Organisms from different species looking for the same resources.
Step-by-step explanation:
- The symbiotic relationship is a parasitic one. The worm acts as a parasite because it lives in the body of the cow and gets nutrition from it. The cow is known as the host in this relationship as the cow feeds the worm.
- The cow does not get the required nourishment as all the nutrients are taken by the worm and so the cow becomes malnourished. The worm therefore gets the benefits whereas the cow is harmed.