What defines masonry in construction?

Masonry in construction refers specifically to a method of building that utilizes individual units, often made of materials such as concrete blocks, bricks, or stones, bonded together with mortar. When exterior walls are constructed entirely of concrete blocks, they exemplify the defining characteristics of masonry. This approach is known for its strength, durability, and efficiency in creating solid walls that can withstand various forms of external pressure.

The other options describe different types of structures. Metal panel superstructures fall under a different category, focusing on lightweight materials; wooden structures are defined by their timber framing and are not considered masonry; and prefabricated elements refer to pre-made sections that can be assembled on-site, which is also distinct from traditional masonry methods. Thus, the choice that accurately reflects the definition of masonry is the one stating that a superstructure has exterior walls made entirely of concrete blocks.