What makes driving in a stream of vehicles easier?

Your answer is correct. Watching the queue through the windows of the vehicles ahead helps you anticipate the flow of traffic and react smoothly, reducing sudden braking or accelerating. Driving in a slightly staggered position within your lane improves your visibility and allows more space to maneuver if needed. Both these practices make driving in a stream of vehicles safer and more comfortable. Using hazard warning lights while moving (option 3) is not appropriate and can confuse other drivers, so it is not recommended.