I believe that the question you should ask in order to understand an author's diction is What do these words have in common with each other?
Diction in literature is the choice of words, so I'm assuming this answer is correct.
It means pleasant and enjoyable
It is b I suppose, hope this helped luv
Answer:
1. amplifies tone - resonance
2. accuracy of tone - voice purity
3. a solemn promise or pledge of loyalty - plight
4. worn-out, overused - trite
5. the state of being able to adapt to change - flexibility
Explanation: