Katniss volunteers to take Primrose's place in the games.
Rue saved Katniss from dying multiple times. She was very kind to Katniss and they became allies. Unfortunately Ruth was killed and Katniss sang to her while she was dying.
The announcer said that if you were from the same district then both of them could live, but they changed the rule once Katniss and Peta were the only ones. So they decided to eat poisonous berries, but before they ate them they announced that they both could win.