Who embodied the most defined elements of cool (west coast) jazz by understating their melodic and harmonic ideas?

Natural minor half steps between scale degrees 3 and 4; 7 and 8 harmonic minor half steps between scale degrees 2 and 3; 5 and 6 ascending melodic minor half steps between scale degrees 2 and 3; 5 and 6; 7 and 8 major half steps between scale degrees 2 and 3; 7 and 8

In a painting about the horrors of war an artist shows the ruins a house. what is the subject of the painting

Some have called jazz music “america’s classical music.” what is meant by this statement? do you agree or disagree?