Frogs wrestling by ohara shoson is two dimensional or three dimensional art?

2D

Explanation: There's no shading, if you look at pictures on the internet under it has shading that make it look like it's jumping out of the page, but Frogs wrestling has no shading representing the depth of each frog, so in conclusion it's 2D

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.