Which type of window features multiple narrow overlapping glass sections that swing outward?

The type of window that features multiple narrow overlapping glass sections that swing outward is the jalousie window. Jalousie windows are characterized by their slatted design, allowing for ventilation while providing privacy and light control. The slats are typically made of glass or a similar material and can be opened or closed using a crank mechanism. This design is particularly beneficial in humid or hot climates, as it allows for airflow without exposing the interior to direct rain or debris.

In contrast, the other options refer to different window styles. Hopper windows typically open inward and are often used for basement ventilation. Awning windows are hinged at the top and swing outward, usually to provide ventilation while keeping rain out when open. Horizontal sliding windows consist of two or more sashes that slide horizontally to open, lacking the unique slatted design of jalousies. Understanding these distinctions helps in identifying the correct window types for specific applications and environments.