Her sister was chosen even though she had only one slip. Katniss bravely sacrificed herself in her sister's place.
For district 12, it was Katniss, since she was the only female victor, and Haymitch, but Peeta volunteered for Haymitch.
The first big event in the Hunger Games is when Katniss goes to the District 12 reaping with her sister Primrose and other children from District 12.
In District 12 Prim's name is pulled out but Katniss volunteers and Peeta's name is pulled out and no one volunteers.
When her sister Primrose got chosen during the reaping, Katniss volunteered to be a tribute. To save Prim's life.
In "The Hunger Games" series by Suzanne Collins, the first name called during the reaping is usually that of a female tribute from District 12. In the first book, the name called is Primrose Everdeen, also known as Prim, who is Katniss Everdeen's younger sister. This moment is pivotal as it prompts Katniss to volunteer to take Prim's place, setting off the events of the story.
For district 12, it was Katniss, since she was the only female victor, and Haymitch, but Peeta volunteered for Haymitch.
In the book, Katniss doesn't give Prim the mockingjay pin. Madge, the Mayor's daughter gives the pin to Katniss after the reaping. In the movie, Katniss says "I got this for you today" and hands her the pin, then proceeds to say "as long as you wear it nothing bad will happen" as prim is scared for the reaping.
Because on reaping day, two names are picked from each district. One boy and one girl. If your name is picked, you are forced to go into the arena. Katniss's sister Primrose got picked, so Katniss volunteered to take her place in the arena.
In the beginning before the reaping.
The first big event in the Hunger Games is when Katniss goes to the District 12 reaping with her sister Primrose and other children from District 12.
Katniss volunteers for Prim at the reaping, Peeta announces his love for Katniss on national TV, two tributes from the same district can win, Katniss kisses Peeta (and it means something), Katniss and Peeta bluff their way into winning by "swallowing" the berries, Peeta finds out that Katniss was acting her love in the Hunger Games
He mouths 'War terrible war'.
when prim gets reaped she volunteers herself
In The Hunger Games, Katniss's name is entered in the reaping 20 times. Her name never gets chosen in the first book, her sister's Prim name does. Katniss then volunteers as tribute to compete in place of Prim.
Katniss and her family were dressing up for the reaping. The families dress up for the reaping for their children to look good in case they get chosen which means being broadcasted all over Panem.
In District 12 Prim's name is pulled out but Katniss volunteers and Peeta's name is pulled out and no one volunteers.
Since they're in the poorest district, they put their names into the drawing more times in exchange for a tesserae of food, basic household supplies such as candles, clothes, etc.