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

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!

Covalent bond is the correct answer