What is the mood/tone of the song Hero? what words can hope you come to that conclusion

"Hero" advises you to be courageous and powerful. When faced with a difficult circumstance, find the bravery to confront it and overcome it. A hero inspires courage, determination, and bravery.

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.