Mr Graves never speaks in the story Which is the significance of this detail? It provides an example of remaining calm and dignified in the face of evil.
It highlights the fact that no one speaks out against the lottery even though it is murder
It shows that he feels "Sad about his actions but is unable to bring himself to say anything
It illustrates how silence can be used to someone's advantage in tense situations,

either a donut or a sphere or a pancake or a flat sphere. it depends on where the vertical line is.

if the line goes through the center of the circle and is perpendicular to a diameter containing the center, then you get a flat circle.

if the line and the diameter of a the circle meet in the center of the diameter and at an angle, you get a pancake.

if the line is on the circumference of the circle and is at right angles   to the circle you get a ring.

if the line contains the diameter, you get a sphere.

the the line is parallel to the diameter and touches the circumference, you get a donut.

and your question what topic are you in trouble with?