Edgar uses a variety of literary devices in his diction. He uses irony in "The Cask of Amontillado". The irony that Poe employs foreshadows the imminent death of Fortunato.
Kelseys reaction to Ryder is (evidence of )her thoughtful and caring personality.
If this question is multiple choice type then the answer is it has detailed descriptions. A Procedural text involves instructions on how to complete something. This is designed to describe an instruction through a sequence of steps. Hope this helps.
It is important because the sources tell you whether the article was credible. When you have an article that has bad source, you are running the risk of having, wrong, opinionated data. This can discredit you paper if you use it.