Which scenario increases the importance of proper line-following technique?

The choice highlighting the significance of proper line-following technique is particularly relevant in areas with strong currents. In such conditions, the current can significantly affect visibility and navigation, making it easy for divers to become disoriented or lose their way. Using a line as a guide allows divers to maintain orientation and provides a reliable route back to their entry point.

When currents are strong, it becomes essential to have a clear and effective means of navigation to avoid drifting away from the intended dive site and ensure safe ascents and descents. Following a line carefully under these circumstances not only aids in navigation but also enhances safety by ensuring divers can return to the starting point or their exit route without compromising their safety or air supply. In contrast, while proper line-following is important in all dive scenarios, strong currents specifically amplify its significance due to the added complexity and potential hazards they present.