Answer:
It adds more vibrance to his life
Explanation:
since his whole life, everything has been nothing but black white and grey
The correct answer is A. dialogue is used.
This is not a difference between literary and dramatic works. Dialogues are used both in literary texts and in plays, so they are not something that distinguishes the two genres. On the other hand, stage directions are written only in dramatic works, and only they are meant to be performed on stage, whereas novels and other literary works are not.