When adding layers to a wall in Revit, what is true about the layer properties?

The correct choice highlights that the properties of wall layers in Revit have a direct impact on the wall's structure and performance. Each layer in a wall assembly can be defined by its material, thickness, and function. For instance, different materials can influence sound insulation, thermal performance, and structural support. Adjusting layer properties allows you to optimize these characteristics for the intended use of the wall, ensuring that it meets both aesthetic and functional requirements.

The other options do not accurately reflect how wall layers function in Revit. Layers can indeed be adjusted after their creation, which allows for flexibility in design as project requirements evolve. They are not limited to visibility in 3D views; instead, they can also be viewed in floor plans, sections, and other view types. Finally, while layers can be removed, they can also be added back or modified as needed, ensuring that the designer maintains control over the wall's composition and performance throughout the design process.