When considering average velocity, which of the following is a critical aspect of calculating for a combined trip of riding and walking?

To determine average velocity for a combined trip of riding and walking, the total distance traveled is crucial. Average velocity is defined as the total displacement divided by the total time taken. In scenarios where different modes of transport are involved, calculating the total distance provides the entire journey's length, which is necessary for finding the overall average velocity.

While the mode of transport, terrain, and average speed of each segment can affect travel time and experience, they do not directly factor into the formula for average velocity as the total distance does. The total distance gives a comprehensive view of how far the person has traveled, a critical element in understanding their average velocity for that combined trip.