What is the primary function of a school bus's HVAC system?

Answer: B — To regulate temperature and ensure passenger comfort

The primary function of a school bus's HVAC (Heating, Ventilation, and Air Conditioning) system is to regulate temperature and ensure passenger comfort. This system plays a critical role in maintaining a safe and comfortable environment for students and drivers, particularly during extreme weather conditions. The HVAC system achieves this by providing both heating during cold months and cooling when temperatures rise, ensuring that passengers have a suitable climate inside the bus. Additionally, it helps with air circulation and filtration, promoting a healthy atmosphere free from excessive humidity and unpleasant odors. Proper functioning of the HVAC system is essential, as it directly impacts student well-being on their journeys to and from school.