Answer:
Kindness creates loyalty.
Step-by-step explanation:
The statement that best states the theme of this excerpt is 'Kindness creates loyalty.' In the novel, though Darry was the oldest among the three Curtis brothers, Ponyboy, the narrator, couldn't actually connect with him emotionally because of his authoritative behaviour.
However, Ponyboy could connect with Soda, the middle son, more because he was always kind to him. Soda understood him and always listened to him without any judgements. He also treats him respectfully and dearly, thus Ponyboy was loyal to him and truly looked up to him.