The correct answer is A. Dormer window.
A dormer window is a window that projects from the sloping roof of a building, with its top parallel to the roof surface. It is typically used to provide light and ventilation to an attic or other space under the roof. Dormer windows can be either fixed or operable, and they can be made of a variety of materials, including wood, metal, and vinyl.
A skylight window is a window that is installed in a roof or ceiling to provide natural light to a room below. Skylights can be either fixed or operable, and they can be made of a variety of materials, including glass, plastic, and metal.
A lantern window is a small, circular window that is typically located in the roof of a building. Lantern windows are often used to provide light and ventilation to an attic or other space under the roof.
A louvered window is a window that is made up of a series of horizontal or vertical slats that are arranged so that they can be opened or closed to control the amount of light and air that enters a room. Louvered windows are often used in bathrooms and kitchens to provide ventilation while still providing privacy.