Which line of poetry has the clearest line of alliteration? Fiona fretted and paced, and feared for the future. My heart broke in anguish, and in anguizh, and in anfyish myove shattered.

The line "My heart broke in anguish, and in anguish, and in anguish my love shattered" has the clearest line of alliteration with the repeated sound of "anguish."