What do the letters "4WD" stand for?

The correct interpretation of "4WD" is "Four-wheel drive." This terminology refers to a drivetrain system that powers all four wheels of a vehicle simultaneously, providing enhanced traction and control, particularly in off-road conditions or inclement weather. This system is fundamental in many Jeep models, emphasizing their capability and performance in rugged terrains.

Understanding "4WD" as "Four-wheel drive" is essential for recognizing how a vehicle can distribute power effectively, allowing for better handling on various surfaces compared to two-wheel drive systems. Each of the other terms listed does not accurately reflect the function or meaning associated with "4WD," and thus, they are not applicable in this context. The focus on drive as opposed to aspects such as displacement or dynamics highlights its core purpose in vehicle operation and off-road performance.