Final answer:
Yellow journalism is a type of journalism characterized by sensationalist reporting and inflammatory headlines. Its main purpose is to attract readers and sell more newspapers through sensationalism.
Step-by-step explanation:
Yellow journalism is a type of journalism that is characterized by sensationalist reporting and the use of inflammatory headlines backed by little or no factual reporting. It was practiced by some newspapers in the late 19th and early 20th centuries to attract readers and sell more papers. The main reason why a newspaper would engage in yellow journalism is sensationalism, as it aimed to capture the attention and interest of the public through shocking and scandalous stories.