In order for the first paragraph of an essay to actually be a proper introduction (in other words, for it to fulfill the requirements of a proper introduction), it must do two things. These two things are:
1) Include a thesis statement.
2) Provide a preview or essay plan for the essay.
So what do these two things mean?
1) A thesis statement is the sentence (or sometimes sentences) that tells the reader what the position of the author is. When you are given an essay question, the thesis statement is your clear and concise answer to the question. For example, if an essay question was 'What were the causes of the Holocaust in World War II?' then your thesis statement would be something like 'There were many complicated and inter-related causes for the Holocaust, including the economy of Germany, the ideology of the fascists, and Hitler's personal racism.'
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