Well with no picture I can't help, but just describe the birds as you see it! :)
Not sure what graph you’re talking about but i know that when you play an instrument the pitches are different regarding the note and tone you play
The drawing was based off the correlations of the ideal human body proportions described by the ancient Roman architect Vitruvius
Answer:
the arrangement or composition of music for instruments especially for a band or orchestra. the use or application of instruments (as for observation, measurement, or control): instruments for a particular purpose also : a selection or arrangement of instruments.
Explanation: