Part 4:

More melody:
Handel song - showing modulation from major to minor, and a "landscape of highs and lows, hills and valleys" in the melody.

Relates Mozart and Handel to pop music.

Uses Mendelssohn Violin Concerto to demonstrate melodic development (modulation, elaboration, figuration etc. etc.).

Mahler / Vaughan-Williams et al. - reintroduced folk/modal melodies and drew on older styles.