In English grammar, a subject is one of the two main parts of a sentence. (The other main part is the predicate.) ... The subject usually appears before the predicate to show (a) what the sentence is about, or (b) who or what performs the action. As shown below, the subject is commonly a noun, pronoun, or noun phrase
<u><em>Personification </em></u>is the attribution of a human characteristic to something non -human. In this sentence the strings stand for a musical instrument, which is non-human. The strings cannot sing a song like humans can.
Question: which object or concept is personified here?