Which of the following is an example of a structural component regulated by the code?

Load-bearing walls are a crucial example of a structural component regulated by building codes. These walls are designed to support the weight of the structure above them, which includes not only the roof but also floors and any additional loads. Building codes establish specific requirements for their design, materials, and construction in order to ensure the safety and stability of a building. Regulations regarding load-bearing walls address factors such as materials' load capacities, wall thickness, and proper construction practices to avoid structural failures.

In contrast, the other choices, while they may be important for aesthetic or functional aspects of a building, do not directly affect the structural integrity. Interior decoration materials, window treatments, and exterior paint types focus more on the appearance and interior comfort of a building rather than its ability to safely support weight. Therefore, they are generally not subjected to the same rigorous standards set forth by building codes for structural components.