When starting to create a self-portrait, artists can use a mirror to first find what element of art on their face? Color
Line
Mood
Texture

Texture

Explanation:

You wouldn't find Colour on your face (i'm british and i spell it colour not color) except skin tone and maybe eye colour, line on your face makes no sense and mood also makes no sense. Texture is something you can see on your face like colour but colour is just a copy paste while with texture you have to have some attention to detail.