Final answer:
The key in bars from 140-155 is E flat major (Eb major).
Step-by-step explanation:
The key in bars from 140-155 would be E flat major (Eb major).
- First, we need to determine the key signature for E flat major.
- E flat major has three flats: B, E, and A.
- Looking at the given bars, we can see that the notes in these bars include Eb, Ab, Bb, C, D, F, and G, which are all within the key signature of E flat major.
Therefore, the key in bars from 140-155 is E flat major (Eb major).