During the beginning of the book Katniss was more independent and the only other person she depended and trusted was Gale. After her dad died she realized she had to because she couldn't rely on her Mom to take care of herself and Prim.
I need to get some food for my sister and mom.
When Prim got chosen for the Hunger games, Katniss had to show how unselfish she is to everyone by taking Prims spot in the Hunger Games. Before that part in book Katniss is the one who provides for her family. So on top of all that pressure to provide for her family she takes her sister spot in Hunger Games. So her actions show how unselfish she is.
Prim and Peeta you have been selected for the Hunger Games.
No, I'll take Prim's spot
When the Hunger Games begin Katniss seperates from Peeta thinking she could do it alone. Katniss has a hard time trusting people only because for most of her life she only relied on herself to get things done. But she realized that people wanted her dead first she knew she needed help.
Where's that girl from district 12
Katniss please be safe.
Yea, I wanna personally make sure she's dead.
Katniss realizes that she can't win the Hunger Games alone so she makes an Allie named Rue from district 11 and she also puts her trust in her because they are both alone and afraid and both have talents that both work togeher
Hi, I'm Rue. From district 11
Hey, I'm Katniss. From district 12
When Peeta gets hurt in the hunger games it causes Katniss to feel real emotions and have empathy for someone that she usually doesn't care about. She realizes that she actually cares for someone other than Prim.
Peeta, Don't worry your leg is going to be ok.
At the end of all this we see Katniss develop as a person and just realize that she is allowed to trust and care for others because the only reason why she won the hunger games is because of that. I think the reason she is afraid of caring for others is because she is afraid of losing them, but by the end of the movie I think she realizes that is how life is.
This year, the winner of the 74th Annual Hunger Games are Peeta Mellark and Katniss Everdeen. Congratulations.