The social hierarchy in delphi

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?

Land cool more quickly than water. as a result the pressure over the water is lower than that over the land, and the air moves from the land to the water. what is this known as. a) prevailing winds b) sea breexes c) land breezes d) valley breezes