。
She played the violin.
Literal
She [topic-は] violin [object-を] played.
弾く is the verb for playing stringed and keyed instruments — violin, guitar, piano, harp. Wind instruments take 吹く ('blow'), and percussion takes 叩く ('strike') or 打つ ('hit'). Each verb tracks the physical action involved, so the verb tells you something about the instrument family even before you hear the noun. Notice how compact the sentence is once you trim away politeness: subject, object, verb — Japanese SOV in its most basic form.