Which type of sign is required to warn against potential hazards?

The correct choice is Caution. This type of sign is specifically designed to alert individuals to potential hazards that might cause minor or moderate injury if not avoided. Caution signs typically use yellow as a background color and feature a black symbol or text to convey warnings about unsafe conditions. They aim to increase awareness and encourage safe practices among individuals in areas where hazards may exist.

In contrast, Warning signs generally indicate more severe hazards, while Danger signs represent the highest level of risk, typically indicating an immediate threat to life or health. Notice signs are used for informational purposes, such as conveying instructions or regulatory information, rather than specifically warning about hazards. Thus, Caution signs serve a vital role in ensuring safety by bringing attention to potential risks without necessarily indicating an immediate or severe threat.