Which of the following describes a flat roof?

A flat roof is defined as a roof that does not slope, which means it has little to no pitch. These roofs are commonly used in commercial buildings and are characterized by their horizontal or near-horizontal surface. This design allows for various applications, such as rooftop gardens, HVAC systems, or solar panels.

In contrast, roofs with a steep incline are designed to facilitate water runoff and often have a different construction and design purpose. Roofs suited for warm climates typically include features like ventilation and insulation that aren't synonymous with flat roofs. Additionally, while flat roofs do require some structural support due to their design, this characteristic is not defining; there are various roofing systems that may require substantial support unrelated to being flat or pitched. Thus, defining a flat roof specifically as one that does not slope captures its fundamental characteristic accurately.