Final answer:
The theme of valuing the advice of others is showcased through conflicts between the buckwheat and other characters, which emphasize the buckwheat's pride and the repercussions of not heeding others' counsel.
Step-by-step explanation:
The theme of listening to the advice of those around you in the fable mentioned by the student is developed through a literary strategy that involves creating conflict between characters to convey a message. Option A: by using conflicts between the buckwheat and the other characters to illustrate the buckwheat's excessive pride, is the best description of how the author develops this theme. The conflicts serve as a narrative device to highlight the consequences of ignoring good advice and underscore the importance of humility and openness to others' perspectives. The conflict illuminates the theme and promotes deeper understanding for the reader.