Explanation:

Walking on the road can be dangerous, as it is primarily meant for vehicles. To ensure our safety while walking, it is important to follow certain rules and guidelines. The correct answer is option 'C', which suggests walking on the footpath. Let's explore why walking on the footpath is the safest option:

1. Safety:
Walking on the footpath ensures that we are away from the traffic and vehicles. It provides a safe space for pedestrians, away from the moving vehicles on the road.

2. Pedestrian Priority:
Footpaths are specifically designed for pedestrians. They are built at a higher elevation from the road, making it easier for pedestrians to walk without any obstructions.

3. Zebra Crossings:
While zebra crossings are marked on the road to facilitate safe pedestrian crossings, they are not meant for walking along the road. Zebra crossings are designated areas where pedestrians can cross the road, but it is not safe to walk along the road on a zebra crossing. Therefore, option 'B' is incorrect.

4. Road Usage:
Roads are primarily meant for vehicles. Pedestrians walking on the road can pose a risk to both their own safety and the safety of the drivers. Therefore, option 'D' is incorrect.

Conclusion:
To ensure our safety while walking, it is important to follow traffic rules and guidelines. Walking on the footpath is the safest option, as it keeps pedestrians away from the traffic and vehicles on the road. Always remember to use the footpath and cross the road at designated pedestrian crossings like zebra crossings when necessary.