Final answer:
A skyscraper is a building of exceptional height and many stories, supported by a steel or concrete framework from which the walls are suspended. They emerged in the late 19th century as a way to concentrate commercial office functions within limited downtown space.
Step-by-step explanation:
A building of exceptional height and many stories, supported by a steel or concrete framework from which the walls are suspended, is called a skyscraper.
Skyscrapers emerged in the late 19th century as a way to concentrate commercial office functions within limited downtown space. They are made possible by the invention of steel girders that can bear the weight of the building, as well as the development of safety elevators and steel frames.