Aworm is living inside a cow and stealing nutrients from the cow's body, causing the cow to become malnourished. what type of symbiotic relationship is this?

a. two or more organisms looking for the same resource
b. adults outcompeting offspring for resources
c. organisms from the same species looking for the same resource
d. organisms from different species looking for the same resource

Option D, Organisms from different species looking for the same resource

Explanation:

Here the cow and worm belongs to two different species. While a cow belongs to a B.Taurus,  a worm belong to species Taenia. Though both these organisms belong to different species they depend on the same food which is ingested by the cow for its own nourishment.

This a kind of symbiotic relationship in which the cow is harmed while the worm is benefitted.  

Thus, option D is the correct choice of answer