What is the relationship between "run" and "marathon" similar to "walk" and which of the following?

The relationship between "run" and "marathon" highlights a specific type of running activity that emphasizes distance and endurance. A marathon is a long-distance running event, typically covering a distance of 26.2 miles.

In a similar vein, "walk" relates to "walkathon." A walkathon is an organized event where participants walk a certain distance or for a specific period of time to raise funds or awareness for a cause. Just as a marathon focuses on running, a walkathon centers around walking, emphasizing not just the activity but also the organized nature and purpose behind it.

The other choices, while related to walking or distance activities, do not capture the same type of structured event that "walkathon" does in relation to "walk." Therefore, the strongest connection is made with "walkathon" as it reflects a specific organized walking event akin to how a marathon relates to running.