What is the primary role of the ACS in aircraft systems?

The primary role of the Air Conditioning System (ACS) in aircraft systems is to lower the temperature of engine bleeds and deliver air for pressurization. The ACS plays a crucial role in maintaining a comfortable and safe environment within the aircraft cabin, especially at high altitudes where temperatures can drop significantly and air density is low.

This system manages the temperature of compressed air that is drawn from the engines, which can be very hot due to the combustion process. By cooling this bleed air, the ACS ensures that the cabin environment remains comfortable for passengers and crew. Additionally, providing pressurized air is essential for maintaining the proper atmospheric conditions within the cabin, preventing hypoxia, and ensuring operational safety during flight.

The other options present roles that are either unrelated to the primary function of the ACS or not accurate regarding its main purpose.