Final answer:
The birth of Obed to Ruth and Boaz reverses Naomi's prior emptiness and bitterness.
Step-by-step explanation:
The subject of this question is English. The question is referring to a story or text that involves characters named Ruth and Boaz, and their child. The correct answer is d. Obed, as Obed is the son born to Ruth and Boaz, according to the biblical story. This story can be found in the book of Ruth in the Old Testament.