What type of window includes two or more sashes with at least one that moves horizontally?

The correct choice is the type of window that features two or more sashes, with at least one that operates by sliding horizontally. This description perfectly fits the horizontal sliding window, which typically has one fixed sash and one or more sashes that can slide to the left or right. This functionality allows for efficient ventilation and is a practical choice in various architectural designs.

Awning windows are hinged at the top and open outward, providing airflow while protecting against rain, but they do not have horizontal movement. Jalousie windows consist of a series of horizontal slats that can be adjusted, but they do not operate as sliding sashes. Casement windows are hinged on the side and open outward, typically providing unobstructed views but do not slide horizontally. Understanding the mechanics and characteristics of different window types is essential for recognizing their applications and functionalities in construction and fire safety scenarios.