Treble clef

[Vania]

a sign on a stave (= the five lines on which music is written) which shows that the notes are above middle C (= the C near the middle of a piano keyboard)

[Jessica]

in Western music, a sign that shows the second line of a staff (= the five lines on which music is written) is the note G above middle C (= the note C near the middle of the piano keys)