Why do we add illustrations and photographs to stories?

a. to take up space in the book

b. to the reader envision the story

c. to the reader's imagination

d. to make the story easier to read

B. To help the reader envision the story,
Because sometimes a writer might have something very specific that they want the reader to see or know, that you can't get from reading, adding an illustration can help make a better picture. plus, who doesn't love seeing a picture in a book now and then? 

Callused, scorching, prowls