Answer :
When writing his paper, Luke committed plagiarism. Plagiarism is when someone uses another person's ideas or work without giving them credit. In this case, Luke did not identify the original author of the ideas and information he used; instead, he presented them as his own. This action is considered plagiarism because it involves taking credit for someone else's work without proper acknowledgment.
In contrast, including quotations involves directly citing someone else's words in the paper, typically with quotation marks and a citation to give credit to the original author. Inserting a citation means providing a reference to the original source of information used in the paper. Adding paraphrasing involves rephrasing someone else's ideas in one's own words while still giving credit to the original author. However, in Luke's case, he did not take any of these actions, leading to the act of plagiarism.