Final answer:
The suspension system is responsible for controlling the axle positions beneath a vehicle, ensuring vehicle stability, handling and passenger comfort.
Step-by-step explanation:
The position of the axles under the vehicle is controlled by the suspension system. The primary function of the suspension system is to provide stability and handling while also delivering comfort for the passengers.
It's not solely the engine, steering wheel, or brake system that control the access location, but rather the suspension system that's crucial for the smooth operation of the vehicle's movement and to ensure safety on the road.