Why do tractors have large tires bulldozers have caterpillar tracks and heavy trucks may have eight rear wheels?

Tractors have large tires to provide better traction and stability on uneven agricultural terrain, allowing them to effectively pull heavy loads. Bulldozers use caterpillar tracks to distribute their weight over a larger surface area, which prevents them from sinking into soft ground and enhances their ability to move heavy materials. Heavy trucks may have eight rear wheels to increase their load-bearing capacity, improve stability, and enhance traction, especially when transporting large or heavy cargo. This design helps ensure safety and efficiency in various driving conditions.