Who first explained the theory of cultural diffusion?

Will someone earth science water cycle: will someone tell me how the water cycle works, but in a story? ? pretend you are a drop of water somewhere. (like; "once i was floating around in a cloud" or, "once i was lying in a puddle in the middle of a parking lot.) and tell your life story! and use the words "evaporation" "condensation" "accumulation" "transpiration" "precipitation" and "runoff" tell the story like your the drop of water telling your life story. include all the parts of the water cycle including those vocabulary words above. and !

Can someone me choose a broad topic and area of focus i am really doing this as a tally to see which one most people pick ok water pollution global warming endangered species atmosphere for the !

What are the answers for the following questions?