Dear salt HEY,
Yours is an interesting question and I learned some things, glad you asked this. The concept of geography themes was adopted in 1984 by the Association of American Geographers. The five themes are:
Location,
Place,
Human-environmental interaction,
Movement, and
Regions.
Here are a couple of websites that should help you figure out which one is the answer you need, and good luck to you!
http://geography.mrdonn.org/5themes-definitions.html
http://www.funsocialstudies.learninghaven.com/articles/fivethemes.htm
