A SHADE TECHNIQUE to mark or shade with two or more intersecting series of parallel lines that are use to shade an object.* O Scribbling O Cross Hatching O Stippling O Blending ​

B

Explanation:

Hatching is an artistic technique used to create tonal or shading effects by drawing closely spaced parallel lines. (Taken from Wikipedia)

the string with the finger instead of using the bow

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)