I believe the answer is C.
"C. Ecosystem"
An ecosystem is described by the interaction between living organisms in a given area, interacting with others, and non-living aspects of the environment where they are in. By considering the living place of a woodchuck, what they eat, and where they feed, we are talking about an ecosystem.
C is the answer to this question.
<span>Actually in this case, it can be confirmed by performing medical laboaratory test like a complete blood count test, then fecal test, then endoscopy test, then Xray test and also may be biopsy of the tissues , hence these are some of the main tests nurse would expect the diagnosis to be confirmed for sure.</span>
