What is the point of Mr. Miyagi’s having Daniel perform the task of waxing the car?

Miyagi becomes Daniel's teacher and, slowly, a surrogate father figure. He begins Daniel's training by having him perform laborious chores such as waxing cars, sanding a wooden floor, refinishing a fence, and painting Miyagi's house. Each chore is accompanied with a specific movement, such as clockwise/counter-clockwise hand motions.

Daniel fails to see any connection to his training from these hard chores and eventually feels frustrated, believing he has learned nothing of karate. When he expresses his frustration, Miyagi reveals that Daniel has been learning defensive blocks through muscle memory learned by performing the chores.

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i think its d, but grammarly says none

explanation: