predator-prey mutualism parasite-host commensalism
I gave my students this multiple choice question: A tick attaches to a deer and consumes blood, harming the deer. This is an example of which type of relationship?

Only one answer is correct among these 4 choices:
- predator-prey
- mutualism
- parasite-host
- commensalism

Could you tell me which one is correct?

parasite-host