The correct answer is - it remains in one key area.
The entire movement is performed in G major, k. 453, whereas the symphony sonata-allegro varies the keys it is performed in. The name says 'allegro,' which means 'lively,' and is characterized by fast pace in music, and the use of numerous keys.
Ummmm thats to much work
Your teacher is insane
C playful because there funny and original