Usually, a literature review can be described as an objective, concise, and critical summary of published research literature pertinent to the subject being researched in an article. A literature can be an end in itself an analysis of what is known about a topic or a prologue to and rationale for engaging in primary research. Organize the literature review around key topics of concepts. Use headings or topic sentences to convey your organizational principle. Use a summary to assist the reader to relate every section to the wider topic and to clarify your argument's movement.
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Essays mean different things to different people. For some, it is a long boring article that they are forced to write or read, for some it is a short opinion and for some, it is well, just an essay. The essay has come to mean different things for we interpret essay in different ways, perhaps based on our interest level. If the topic of the essay is something of interest, then no essay will look too tardy or long, and maybe we will ask for more, but some essays on drab topics can get tedious to read and more so to write. Essays are typically composite articles meant to inform, discuss or narrate on selected topics or themes.