Answer:
Scaffolding
Step-by-step explanation:
Daliah was at a diner with her 3-year-old son. When he was done with his lunch, he wanted to take his tray to the trash can. Because Daliah wasn't sure he would be able to complete that task without dropping everything, she helped him hold one side of his tray. When she realized he could hold the tray without dropping it, she allowed him to complete the task all by himself. According to Lev Vygotsky, the concept that Dallas just engaged in is called SCAFFOLDING