Which of the following is an example of a building projection?

A building projection refers to any architectural element that extends outward from the main façade of a building. Cornices, eave overhangs, and exterior balconies all fit this definition, as they protrude from the building's surface.

Cornices, which are decorative moldings at the top of walls, not only add aesthetic value but also project outwards, creating shadow lines and contributing to the overall design of the structure. Similarly, eave overhangs extend from the roof, providing shelter from rain and reducing potential water damage to the walls. Exterior balconies serve as functional outdoor spaces that also project out from the building, offering views and access to fresh air.

Since all three elements demonstrate this outward extension from the primary structure, the correct answer encompasses all of them, making it clear that all listed options are valid examples of building projections.