Extract Hierarchical Topic Map from Main Topic

Please respond only in the [Language] language. Construct a hierarchical topic map for the main topic [Main Topic]. The map should systematically organize the content into layers, starting from the most general aspects of [Main Topic] to more specific subtopics and related concepts. Follow these steps:

1. Identify Subtopics: List the primary subtopics that fall under [Main Topic]. These should represent broad categories or themes related to the main topic.
2. Detail Secondary Subtopics: For each primary subtopic, identify secondary subtopics or themes that provide further granularity and detail.
3. Explore Related Concepts: Within each secondary subtopic, pinpoint specific concepts, methods, or issues that are pertinent. This layer adds depth, showing the complexity and richness of the topic.
4. Include Cross-Links Where Applicable: Note any significant overlaps or cross-relations between different subtopics or concepts, illustrating the interconnectedness within the topic map.
5. Highlight Emerging or Niche Areas: Mark any emerging trends, niche areas, or gaps within the topic map that could represent opportunities for further research, content development, or innovation.

The hierarchical topic map should be presented in a clear, visual, or list format, enabling easy navigation and understanding of the relationships between the different layers of the topic.

Provide a brief rationale for the organization of the topic map, explaining the logic behind the hierarchical structure and the selection of subtopics and related concepts.