Stability enhancing devices such as extendable axles, outriggers, and stabilizers are generally used to:

Stability enhancing devices like extendable axles, outriggers, and stabilizers are specifically designed to improve the safety and stability of a unit, especially during operation. These devices help distribute the weight of the equipment over a larger area or provide additional support, which in turn reduces the risk of tipping or losing control while in use.

For instance, outriggers extend the base of support of a lift or platform, allowing it to operate safely on uneven ground or at greater heights without compromising stability. Similarly, stabilizers can prevent rocking or swaying movements that could occur during operation. By enhancing stability, these devices not only ensure the safety of the operator and the equipment but also maintain the integrity of the load being handled. This focus on stability is crucial in preventing accidents in environments where lifts are used.

The other choices do not align with the primary function of these devices. Reducing weight, increasing driving speed, or limiting height do not directly relate to increasing the stability of the unit, which is the key objective of using such stability-enhancing features.