An interaction between organisms that rely on the same resources

A. Ecosystem

B. Organism

C. Competition

D. Population

E. Resources

Ithink the answer is a or d.

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.