Which practice is essential to ensure safety when reversing a vehicle?

Answer: C — Checking for traffic and pedestrians

The essential practice for ensuring safety when reversing a vehicle is checking for traffic and pedestrians. This is crucial because reversing poses a significant risk; the driver often has limited visibility and may not be aware of everything in their surroundings. By actively checking for other vehicles, pedestrians, and obstacles before and during the maneuver, the driver can assess potential hazards and avoid collisions. This practice significantly reduces the likelihood of accidents by allowing the driver to take necessary precautions based on their observations. In contrast, moving in reverse without looking can lead to accidents, as the driver may not be aware of what is behind them. Consulting a GPS may not be beneficial during reversing, as GPS devices are not designed to provide real-time alerts about immediate surroundings. Hurrying to complete the maneuver increases the risk of not adequately ensuring the area is clear, heightening the chance of an accident. Thus, the practice of checking for traffic and pedestrians is vital for safe reversing.