Sophia is looking for a soft drawing material that will give her the flexibility to sketch dark and light areas. The material should also enable her to produce sharp lines as well as wide, smooth lines. Sophia could choose wax crayons or chalks and
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Sophia could choose wax crayons or chalks and color pencils.                                                

Explanation:

For soft drawing materials, color pencils will be very suitable. Sketches and color pencils will give the flexibility to shade dark and light areas. It will have many colors and we can choose which color we want to use.If the pencil is not sharp we can Sharp it using the sharpener. It will help draw sharp and wide smooth lines. It is best to sketch all diagrams, graphs and all the pictures.

∵they depict sad lonely people  ∵  figures in them have long limbs and faces, similiar in style to paintings by el greco.