It is less vivid; "raced after" emits a feeling of either action, suspense, or energy. It allows the reader to connect and fully understand what is going on. "ran after" is vague and emits little high energy.
Answer:
in order to describe a setting you would have to go back to any passage that you read and discribe how you think it might of looked and put evidence of what made you feel that it looked like the way you discribed it ! hope this helps
B. By showing evidence that represents what the speaker is talking about
