Answer: D) Scaffolding
Explanation: Scaffolding can be Simply defined as an instructional method where tutors guide and direct their tutees in performing certain tasks and as the tutees become efficient in these tasks, the tutors begin to withdraw there involvement or influence unless the tutees request for it.
Walter's mom withdrawing from holding his hands and guiding him through the shoelaces tying process to just verbally guiding him through the process is a good illustration of Scaffolding.