The word that best contribute to its respectful tone is full basket. The correct option is A.
A respectful tone is a way of better communication which represent positivity and enhance the quality of your communication. A respectful tone can be achieved by saying clear things with proper grammar.
The excerpt is taken from An Indian father's plea, it is a letter from an Indian father to the teacher of his son.
Thus, the correct option is A. full basket.
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