Is melody the Treble clef and called harmony as well?
Rhythm is the type of notes used, true?
Michelle, please sign up for the free course as I think it will answer man of your questions.
Melody can be in any clef, and any part. Harmony refers to the phenomenon that happens when multiple pitches are played at the same time. The intersection of melody and harmon is counterpoint.
Rhythm has to do with the length of notes, the meter, and the tempo of a piece.