Tessie Hutchinson on the stool about to have rocks thrown at her because she drew the paper with the black spot. This represents humans callousness and condonement of some form of violence.
These are the kids who are gathering and protecting rocks in order to proceed with the final part of the lottery involving throwing stones like savages. It is meant to recreate the scene of the stone gathering.
Tessie, in her home, having almost "clean forgot" the lottery was today while doing her dishes. This scene shows her running out to go to the lottery.