Question

look at the graphic. which phrase best fits in the center circle? businessses of the frontier inventions of the frontier resources of the west settlers of the west animal furs land to farm precious metals forests

Explanation:

The outer - circle elements (animal furs, land to farm, precious metals, forests) are all resources. The settlers used these resources, and businesses were built around them. Inventions also utilized these resources. So the central concept that ties them all together is resources of the West.

Answer:

Resources of the West