Two-year-old carmen is trying to fit pieces into a wooden puzzle form. her father carmen turn the pieces so they fit snuggly in place. as carmen's skill improves, her father steps back, letting her try on her own. this example best illustrates the concept of

I believe the answer is: Scaffolding
Scaffolding in this context refers to the process of a certain individual explaining a model to solve a certain problem toward another individual.
This term was first introduced by . Psychologist and instructional designer named jerome bruner in 1960s.