Describe the four shading techniques

Smooth:shade smoothly

Cross hatch: continuously draw lines like a x

Slinky: keep going in circles

Stipple:dots

Explanation:

"prior to 1910, these new artists were called neo-impressionists, and they believed that "modern paris" was the proper subject for their paintings."

this is the text provided by the program, disregard other answers, as they are confusing and based on loose knowledge of the subject.   : )