Answer:
It highlights the fact that no one speaks out against the lottery even though it is murder
Step-by-step explanation:
Mr. Harry Graves from the short story "The Lottery" is a symbolic and important man because of his rile in the book as people who "win" the Lottery are sent to him.
The Lottery is about a town who has a tradition of drawing from a pool of names and whoever is selected, is "sacrificed" to ensure that the town prospers. No one knows why this tradition is in place, but they do it anyways, even though they feel its wrong.
The importance of Mr Graves keeping silent through out the novel is that no one speaks out about the lottery, even though it is murder.