In my personal opinion art is a little easier than science since im more on the creative side :)
I believe the answer is internal belief.
A. key signature , the key signature is a list of all the sharps and flats in the key that the music is in.
Answer:
Line
Shape
Leonardo da Vinci used various types of lines in his famous painting--the Mona Lisa. The most evident are the curved lines, used in the forming of the face, hair and clothing.
Size
In his painting, Leonardo used mainly organic shapes, especially for curves and the jagged mountains in the backdrop.
Perspective plays a great part in da Vinci's work, as the background can be seen as further back from the main figure in the painting.
Color
The colors used in the Mona Lisa are brown/grey, earthy tones to convey a neutral feeling, which conveys neither a feeling of happiness nor sadness.
Tone
The main direction in this painting is curved, which conveys a feeling of gentleness, because of the shape of the main figure, which is the centre of the painting.
Direction
Shading done by Leonardo da Vinci is very detailed in the way that he painted the face of the Mona Lisa, as shown in the creation of her mouth, which has very specific shading on the corners of the lips.
Texture
The real texture of the painting is a cracked, rough surface, but the simulated texture by Leonardo is the smoothness of the figure's skin and the roughness of the backdrop.
(i hope this helps i just looked this up im not sure if its accurate)
