Here's why:
* Physical resemblance: Both the Avox girl and Prim have red hair and a similar delicate, youthful appearance.
* Shared vulnerability: The Avox girl, like Prim, is innocent and has been subjected to harsh treatment.
* Katniss's protective instincts: Katniss felt a strong urge to protect the Avox girl, mirroring her deep love and protectiveness toward Prim.
This connection emphasizes the theme of survival and the lengths people will go to protect their loved ones, even in the face of overwhelming odds.