Answer:
Anaphora
Step-by-step explanation:
Anaphora is the repetition of a word or phrase in quick succession. I can see Anaphora in the poem by Jared Singer in the sentence,
"Record everything they could have told you,
every how could I have let her go away,
every she was the best thing that ever happened to me."
The repetition of the word, Every, is Anaphora.
Jared thus emphasizes what he would have done to assure Sarah that she was loved and protect her from taking her life.