You use a comma because it is a break in the sentence
D. dictionary
For the purpose of an informative piece (be it an article or essay), you will have a very distinct goal of teaching your audience or readers, by manner of presenting information (demonstrating), how to do something or give them enough information by manner of defining or describing something to where they could do something on their own.
The <span>event from Grendel best demonstrates the human connection between Grendel and the king's men is the king men</span>
