Tapeworms attach to the intestinal wall of sheep and absorb nutrients from the sheep's intestines. Which of the following best describes the relationship between tapeworms and sheep? A. parasitism
B. commensalism
C. predation
D. mutalism
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It's A

Explanation:

This is parasitism! When one organism takes nutrients and other things from another, it's parasitism. In this case, the tape worm is the parasite. But we know it's a parasite because it says that it takes food that the sheep eats, and takes it for itself. If the parasite, for some reason, takes all the sheep's food, the sheep could get sick. The sheep gets nothing good out of this.