The air mass remains stable at roughly the same temperature and humidity,taking on all characteristics.They are only moved when high level winds take place
Explanation:
Geography (from Greek: γεωγραφία, geographia, literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and phenomena of the Earth and planets. ... Geography has been called "the world discipline" and "the bridge between the human and the physical sciences".
I believe your answer would be A- Farmers and urban dwellers.
Hope this helps. Correct me if I'm wrong.