What should be confirmed about the passenger seats during an inspection?

The correct answer emphasizes the importance of the structural integrity of the passenger seats in a transit vehicle. Ensuring that the cushions are securely attached to the frame and that the frames are firmly secured to the floor is crucial for passenger safety during operation. Loose or poorly anchored seats could lead to injuries in the event of sudden stops or accidents.

Additionally, the secure attachment helps maintain the overall stability and functionality of the seating arrangement within the vehicle, ensuring that passengers remain safely seated and that the seats do not shift or become dislodged. This structural inspection is a vital part of ensuring that the vehicle adheres to safety regulations and provides a secure environment for passengers.

While the other options present important aspects of seating comfort and safety, such as upholstery materials and adjustable positions, they do not directly address the critical factor of ensuring that seats are properly secured to the vehicle.