。
She plays the piano.
Literal
She [topic-は] piano [object-を] plays.
A textbook-clean sentence: subject-object-verb in polite present-tense form. 弾く (often written 弾く or in everyday writing 弾く) is the verb of choice for stringed and keyed instruments where you pluck or strike — piano, guitar, violin, harp. Wind instruments use 吹く ('blow'), and drums take 叩く ('hit'). Japanese tracks instrument-verb pairings closely, so picking the right verb signals genuine familiarity with music vocabulary.