He large, flat piece of wood within a piano serves the same purpose as a. a bamboo reed. b. the hollow box within a violin. c. a set of wooden drum sticks. d. a guitar pick.

The correct answer is B. the hollow box within a violin.
This large, flat piece of wood found in a piano produces the sound when the piano is played, the same way the hollow box produces the sound coming from a violin. The two items have the same purpose, which is to provide the instrument with sound.

Answer(a) one needs to learn from experts and be determined to be the best in the field;

Hard work and dedication