Which of the following is essential for a vehicle's stability while turning?

A vehicle's stability while turning is indeed influenced by a combination of factors, making the choice of all of the above correct.

Weight distribution plays a critical role in how a vehicle handles turns. When a vehicle turns, the weight shifts, and if it's unevenly distributed, this can lead to instability, increasing the risk of tipping or losing control. Proper weight distribution allows for balanced handling and helps maintain traction on the tires during a turn.

Tire pressure is another fundamental aspect. Properly inflated tires ensure maximum contact with the road surface, which provides better traction and control. Under-inflated or over-inflated tires can negatively affect the vehicle's handling characteristics, making it more difficult to maintain stability during cornering.

The suspension system is designed to absorb shocks from the road and maintain contact between the tires and the surface while also allowing for smooth movement during turns. A well-functioning suspension system helps to prevent body roll and enhances the overall balance of the vehicle, contributing significantly to its stability.

Therefore, all three factors – weight distribution, tire pressure, and suspension system – are essential for ensuring a vehicle remains stable while turning, supporting the selection of all of the above as the correct answer.