Final answer:
Dill suggests that Boo Radley has never run away because he has nowhere better to go, indicating that the familiarity of his confinement may feel safer than the unknown outside world.
Step-by-step explanation:
In Harper Lee's novel To Kill a Mockingbird, Dill reasons that Boo Radley has never run away from his strict, secluded life because he has nowhere better to go. This insight from Dill suggests that Boo remains in his confinement not because he lacks the desire for freedom, but because he either lacks the means to leave or fears the unknown beyond his family's property. The oppressive environment Boo lives in could be more familiar and therefore safer to him than the uncertainties of the outside world, reflecting the human tendency to prefer the security of the known to the risks of the unknown.