The answer would be C. H2O is polar while O2 is nonpolar.
I believe the answer is UNAIDS. hope this helps!
<span>Desertification is the cancer of the earth,” Argentine geographer Elena Abraham told IPS. “It is a process of degradation that does not manifest itself in spectacular ways but furtively advances, and by the time it is visible there is nothing to be done, and people have to move away, in search of an alternative.”</span>
The role of respiration is to take in oxygen and push out carbon dioxide. The respiration takes place in the mitochondrian which is found in the cytoplasm.
Hope this Helps!