Answer:
the correct option is D: Antithesis
Explanation:
An Antithesis is a literary device which features opposing or contrary ideas side by side to achieve a contrasting effect.
<em>"Though they were my joy"....</em>then he adds<em> </em><em>formerly </em>thus negating or reversing the first phrase. The same goes for the second line in the excerpt:
<em>"today I notice them..." </em>then he adds "<em>and turn away forgetting</em>" thus flipping the first part of the sentence. Hence the contrasts are used to creatively highlight his thoughts.
Cheers!
The underlined verb in the sentence is a being verb.
