Final answer:
The events described in the question represent the theme of 2) loyalty, portrayed through characters' supportive actions towards each other.
Step-by-step explanation:
The events described illustrate the theme of 2) loyalty.
This is shown through the actions of the characters where Ponyboy leaves town with Johnny after Bob is killed to support his friend, Dally covers for Pony and Johnny showing his solidarity with them, and Twobit hands over his switchblade to Dally, signifying trust and support within their group.
These moments in the narrative highlight the lengths to which characters go to protect and stand by each other, demonstrating a strong sense of loyalty that prevails over their individual interests.