Answer:
A. the use of different binders. the use of liquid pigmentation.
Explanation:
The main difference between crayons and cakes is that they result from the use of different materials. Although both use wax and pigments, the binder changes.
In wax crayons, the binder used is paraffin wax. And in the case of pastels, the binder is a mix of oil and wax with liquid texture.
in this case, the correct answer is A. the use of different binders. the use of liquid pigmentation.