Question

The primary difference between a musical composition and a sound recording is:

Musical compositions cover the levels of a song; a sound recording covers the lyrics and notes of a song
Musical compositions are protected by Copyright; sound recordings are not protected by Copyright
Musical compositions cover the notes and melody of a song; a sound recording covers the arrangement of a song
Musical compositions cover the live performance of a song: a sound recording covers the original studio recording of a song

Answer 1

I think it is:

Musical compositions cover the notes and melody of a song; a sound recording covers the arrangement of a song

Explanation:

In musical compositions, a person composes, or makes a piece of music that is usually protected by copyright.