Question

a formal region defines an area in which
a core dominates its surrounding hinterland
there are significant geographic variations in physical or human characteristics
a unified government system has been established
there is uniformity in one or more physical or human characteristics
a transportation network links different types of land use

Explanation:

To determine the correct description for a formal region, we analyze each option:

1. First (gold): Describes a functional region (core-hinterland relationship).
2. Second (purple): Talks about "significant geographic variations"—formal regions require uniformity, not variation.
3. Third (red): Describes a political region (unified government system), not a general formal region.
4. Fourth (cyan): A formal region is defined by uniformity in one or more physical/human characteristics (e.g., climate, language, land use). This matches the definition.
5. Fifth (blue): Describes a functional region (transportation network linking land uses).

A formal region is defined by uniformity in physical or human characteristics (e.g., climate, language). The cyan option ("there is uniformity in one or more physical or human characteristics") matches this definition. Other options describe functional or political regions, or incorrect concepts (e.g., geographic variations).

Answer:

the cyan - colored option: "there is uniformity in one or more physical or human characteristics"