Question

which symbiotic interaction involves two organisms competing for the same resource, resulting in a negative outcome for both of the species involved in the interaction?
predation
mutualism
competition
parasitism

Explanation:

Predation is one - organism consuming another. Mutualism is a positive interaction for both species. Parasitism benefits one species at the expense of the other. Competition involves two organisms vying for the same resource and it can have a negative impact on both.

Answer:

competition