The correct answer is D. Illustration on a website
Step-by-step explanation
A nonprint source is any source that is not printed or physical, usually, because they are digital sources accessible only through electronic devices, on the other hand, print sources are those sources that are printed and physical sources and thus distributed through physical copies. In this case, an illustration on a website is not a physical source and people will need an electronic device to have access to it, also, the rest of the options are physical, short stories, encyclopedias and magazines are usually printed and thus people have access to them through physical copies.