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Final answer:Fornatural ventilation, the upwind window should be opened first to create a flow of fresh air into the room. The role of windows in heat transfer, as shown in temperature variations in thermographs, can influence this air movement.Explanation:The question pertains to the concept ofnatural ventilationand asks about which window should be opened first for optimum ventilation. The correct answer is 1) The upwind window. By opening the upwind window first, air will naturally flow into the room due to differences in air pressure. This air will then flow towards other open windows creating a flow of fresh air.Concerning the references provided,temperature variations, as shown in the thermographs, highlight how windows function as significant regions for heat transfer. In the context of ventilation, such heat transfer could impact the movement and circulation of air. Understanding this principle is important for enhancing a room's natural ventilation.Learn more about Natural Ventilation here:brainly.com/question/13033014#SPJ11...