Value is a dark or light scale.
So it would be C. The lightness or darkness of a color.
About 20-20,000 hertz. To make that sound? Be Mariah Carey
If it’s the right hand spaces are FACE (f, a, c, e) from bottom to the top. The line notes are every good boy deserves fudge (e, g, b, d, f,) from bottom to top
The answer is humor! It’s been shown it helps with all of those mentioned benefits :)