Final answer:
Regionalism includes the development of distinct language, customs, and traditions, but 'arriving at an essential truth' is not an element of regionalism. It's a concept tied to philosophy, not to the cultural specifics that define regionalism. The correct answer is option 4.
Step-by-step explanation:
Elements of regionalism typically involve the development of a distinct language, specific customs, and traditions that make regions of the world distinctive. However, 'arriving at an essential truth' is not recognized as an element of regionalism. This term is more associated with philosophical or epistemological pursuits rather than the concrete cultural characteristics that regionalism focuses on. Regionalism seeks to understand and promote the unique characteristics that define a geographic area, often to preserve a sense of community identity and cultural heritage.