Which action can decrease stability?

Narrowing the base of support is an effective way to decrease stability. Stability in any physical activity or movement is often influenced by how broad the base of support is beneath the center of mass. When the base of support is narrower, the ability to maintain balance is compromised. This is because a narrower base provides less area for the weight to distribute evenly, making it easier for the object, person, or athlete to tip over or lose balance if a force acts upon them, such as movement or external pressure.

In contrast, lowering the center of gravity, increasing the mass, and extending the base of support all contribute to increasing stability. A lower center of gravity brings the center of mass closer to the ground, enhancing balance. Increasing mass contributes to greater inertia, requiring more force to disturb the stable state. Extending the base of support allows for greater distribution of weight, further promoting stability as the lines of action from the center of gravity remain well within the base, making it harder to topple.