<u>Answer</u>:
The word or words modified by the ( ) adjectival clause is earrings. So, the right answer to this question is Option D.
<u>Explanation</u>:
A clause which is subordinate in nature, contains an element whose elucidation is given by an antecedent on which the said clause depends grammatically is defined to be an adjectival clause. So, there is an anaphoric relation between the fortified elements present in the relative clause and antecedent on which it relies on. In this sentence, the adjectival clause performs the same function. It modifies the word ‘earrings’ and gives us an idea how the earrings look.
I believe that the answer is that the author is trying to reinforcing the poems tone.
Some strategies I would use would be using lots of detail, colorful words, imagery, figurative language, metaphors,similies. Make you reader see what's happening instead of just reading it. Make them feel something.