Which principle suggests that a building’s design should be led by its function?

The principle that suggests a building's design should be led by its function is rooted in the idea of "form follows function." This concept emphasizes that the shape and structure of a building should be primarily determined by its intended use. Essentially, this principle asserts that the practical requirements of a space dictate its design, rather than merely aesthetic considerations.

For example, a public library would typically be designed with open spaces for reading and studying, ample shelving for books, and designated areas for groups, all aligned with its functional purpose. This approach ensures that the building is practical and efficient for its users, making it more relevant and effective in serving its intended purposes.

In contrast, principles like aesthetics, balance, and harmony involve considerations of beauty, equilibrium, and integration of different elements, which are significant in their own right but do not specifically focus on functionality as the primary driver of design.