Final answer:
Sal decided to run away from the Locktons because she felt caged in Trenton and believed New York offered her the opportunity for freedom and self-actualization.
Step-by-step explanation:
The two things that made Sal decide to run away from the Locktons were the feeling of being caged and the desire to be in a place where she felt she could thrive, specifically New York. Sal felt stifled by her current environment, likening it to being imprisoned in Trenton, and longed for the freedom to explore the world and make her own way. She meticulously planned her escape, saving money from after-school sewing, which allowed her to stay initially at a white Y.W.C.A and find a job as a clerk and waitress. Sal's yearning to break free from constraints and her proactive steps towards achieving independence ultimately led her to take the bold step of running away.