Which system is primarily responsible for adjusting the cabin temperature?

The Environmental Control System (ECS) is primarily responsible for adjusting the cabin temperature in aircraft. This system controls the heating, cooling, and ventilation aspects of the cabin environment, ensuring passenger comfort during flight. The ECS functions by regulating the temperature based on the outside conditions and the desired internal temperature set by the flight crew.

In practice, the Environmental Control System includes components such as air conditioning packs, temperature sensors, and mixers that blend the heated and cooled air to achieve the optimal temperature. It operates independently of other systems, such as the hydraulic control system, which manages the aircraft's hydraulic functions, or the wing deicing control system, which is focused on maintaining wing surface conditions for safe flight. Additionally, while the fuel management system is crucial for managing fuel load and consumption, it has no direct impact on cabin temperature control. Thus, the ECS is specifically designed for maintaining the appropriate cabin atmosphere, making it the correct answer.