Definitions of regions are __ and are based on

The word region: an area or division, especially part of a country or the world having definable characteristics but not always fixed boundaries.

Explanation:

Geographers categorize regions in two basic ways: physical and cultural. Physical regions are defined by landform (continents and mountain ranges), climate, soil, and natural vegetation. Cultural regions are distinguished by such traits as language, politics, religion, economics, and industry.

answerinternational border(ib);