<span>a. organisms that live in different ecosystems - if they live in different ecosystems, they won't compete, wrong answer!
b. organisms that use the same resource -this is the best answer! they would compete over this resource!
c. organisms that live in the same area -this makes competition possible, but more aspect are needed, for example they need to want the same resource (if you only eat apples and y our friend only eats ants, you won't compete)
d. organisms that are classified in the same phylum
-no, they can for example live in different ecosystems! </span>
