What does a yellow diamond-shaped sign indicate?

Answer: C — Warning of potential hazards ahead

A yellow diamond-shaped sign is used as a warning signal to indicate potential hazards or changes in road conditions ahead. These signs are designed to alert drivers to situations that may require caution, such as curves, pedestrian crossings, or other road hazards. The bright yellow color and diamond shape make them easily recognizable, promoting awareness and safety on the road. In contrast, speed limit signs, while important for regulating driving speeds, are typically rectangular. Regulatory instructions are usually conveyed through rectangular white signs, indicating rules that must be followed by drivers. Lastly, signs that provide information about nearby services, such as gas stations or hospitals, use different shapes and colors, often blue or green, distinguishing them from the warning signs that are essential for ensuring safe navigation through potentially dangerous areas.