Question

When two organisms compete in an ecosystem,

A. the organisms do not harm or benefit one another.
Othere is a parasitic relationship between the organisms.
the organisms have a predator-prey relationship.
there is at least one resource that is required by both organisms.

Answer 1

Depends if you are talking about predator and prey your answer will be C but if you are just on ecosystems with the relationship between organisms it would be A