What is the potential risk of not using guardrails when working above the required height?

The potential risk of not using guardrails when working above the required height is the possibility of falling. Guardrails are essential safety features designed to prevent workers from falling off elevated surfaces, which can result in significant injuries or fatalities. When working at heights, the absence of proper fall protection like guardrails increases the risk of accidents, making it imperative to adhere to safety regulations that mandate their use. This measure plays a critical role in ensuring the safety of workers and minimizing hazards at construction sites or other elevated work environments.

The other options suggest benefits that do not correlate with the consequences of neglecting safety measures. Increased visibility, enhanced flexibility, and higher productivity are not relevant in the context of the risks associated with working at heights without guardrails. Safety should always be prioritized over potential gains in other areas when it comes to construction and improvement work.