Simile is a comparison of two things using the words like or as.. He looks like an elephant. Symbolism is a literary method of extending meaning through the use of commonly accepted symbols or something that stands for another thing.
Scholarly literature is written by researchers who are experts in their field. People who write for academic journals are employed by colleges, universities, or other institutions of education or research. They submit articles to the editors of the journals, who decide whether or not to publish the article.
Scholarly or popular sources. Scholarly or popular are terms used to describe a source's content, purpose, audience, appearance, citations and more. Popular sources are useful for getting ideas for a topic or for background and anecdotal information. Typically, however, you should support your arguments by citing scholarly articles, which contain original research written by experts and do not contain glossy pages or advertisements.