Answer:
Step-by-step explanation:
The sentence in which the word "running" is used to show action is:
Joshua is running five miles today after school.
In this sentence, the word "running" is a present participle that functions as a verb to describe the action being performed by Joshua. It indicates that Joshua is currently engaging in the activity of running for a distance of five miles after school. The word "running" is showing ongoing action and provides a clear indication of what Joshua is doing.