Final answer:
Regions in geography can be difficult to define due to overlapping characteristics and factors. They can be defined by a variety of factors such as language, political situation, landform, cultural attributes, or human activities. Regions can also be both functional and formal at the same time.
Step-by-step explanation:
Defining regions in geography can be difficult because regions often overlap. This is because regions can be defined by multiple characteristics or factors such as common government, language, political situation, landform, cultural attributes, or human activities.
For example, a formal region can be a country governed by political boundaries, while a functional region can be a network of locations that function together, like a network of radio stations broadcasting Cincinnati Reds baseball games.
Additionally, regions can be both functional and formal at the same time, like the State of Texas, which is a formal region due to its political boundaries and a functional region due to the common trait of Texans living within its borders.