What is the purpose of the quotation in the first paragraph

It is usually best not to begin or end your introductory paragraph with a quotation. You weaken your argument by relying on someone else's words so early on in the paper. If you do quote in the first paragraph, make sure it is short and to the point.

Explanation:

answer:

not me

explanation:

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that is correct, but there is a fourth one, plasma.

explanation:

plasma is a state of matter that is often thought of as a subset of gases, but the two states behave very differently. but unlike ordinary gases, plasma is made up of atoms in which some or all of the electrons have been stripped away and positively charged nuclei, called ions, roam freely.