What best explains why the brain tells the respiratory system to breathe harder in humid weather?

In humid weather, the air is saturated with moisture, which can make it harder for the body to effectively exchange gases in the lungs. The brain detects the increased levels of carbon dioxide in the blood and the reduced efficiency of oxygen uptake due to the high humidity. As a response, it signals the respiratory system to breathe harder to enhance airflow and improve gas exchange, ensuring that the body receives sufficient oxygen and removes carbon dioxide efficiently.