Question

Which of these is likely to result in the most competition? A. organisms that live in different ecosystems B. organisms that use the same resource C. organisms that live in the same area D. organisms that are classified in the same phylum

Answer 1

"B. organisms that use the same resource" is destined to cause the most competition between those organisms, since resources are scarce and almost always limited.

Answer 2

Yes, your answer is definitely B. Organisms that use the same resource. 

Hope this helps!