which of these units is most appropriate for describing a 26 - mile marathon run?\nterameter\ngigameter\nkilo…

Brief Explanations:

Terameter and gigameter are extremely large - scale units used for astronomical or very long - distance measurements. Nanometer is a very small unit used for microscopic or atomic - scale measurements. Kilometer is a commonly used unit for measuring distances like marathons. 1 mile is approximately 1.609 kilometers, so a 26 - mile marathon is a reasonable distance to be measured in kilometers.

Answer:

kilometer