Question

a formal culture region differs from other regions in that it... does not contain gradations such as core, domain, and sphere. has a selected feature or internal uniformity. has a focal point or node. applies only to linguistic and religion regions. is one that people believe exists.

Explanation:

To solve this, we analyze the concept of a formal culture region:

Key Concept Recall:

A formal culture region (or uniform region) is defined by a selected feature or internal uniformity—meaning a shared cultural trait (like language, religion, economic activity, etc.) that is relatively consistent across the region.

Analyzing the Options:

1. "does not contain gradations such as core, domain, and sphere" → This describes a functional region (which has a core and sphere of influence), not formal. Eliminate.
2. "has a selected feature or internal uniformity" → Matches the definition of a formal culture region (uniformity in a cultural trait).
3. "has a focal point or node" → Describes a functional region (e.g., a city and its surrounding area). Eliminate.
4. "applies only to linguistic and religion regions" → Formal regions can apply to many traits (e.g., economic, political), not just linguistic/religious. Eliminate.
5. "is one that people believe exists" → Describes a perceptual (vernacular) region, based on subjective perception. Eliminate.

A formal culture region is defined by a shared cultural feature (e.g., language, religion, economic activity) that creates internal uniformity across the region. Among the options, only "has a selected feature or internal uniformity" matches this definition. Other options describe functional (focal point, core/domain) or perceptual (people - believe - exists) regions, or incorrectly limit formal regions to linguistic/religious contexts.

Answer:

has a selected feature or internal uniformity.