Which type of buildings are included in Group 5?

Group 5 includes buildings that are primarily used for assembly purposes. This categorization often encompasses structures designed for large gatherings of people, where activities such as social events, performances, exhibitions, or educational functions occur.

Museums fit within this classification, as they are venues where the public assembles to view art, historical artifacts, or scientific displays. They fulfill a cultural and educational role, attracting large groups of visitors who come together to engage with the exhibitions presented.

Research facilities, auditoriums, and theaters, while also significant building types, do not fall under the same specific criteria for assembly as museums do. For instance, auditoriums and theaters might primarily focus on performances and productions, which is a more specific form of assembly than the broader educational and cultural engagement found in museums. Thus, among the options provided, museums are appropriately categorized under Group 5 due to their function as public assembly spaces geared towards education and culture.