Can u explain how to do this is a easy way please, I'm very confused.

Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?

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 !

What could the united states of america do to improve their status? name at least 3(ap human geography)