Wikipedia paragraph in the Introduction section? The Introduction section of a paper is supposed to broadly introduce the topic.
What better beginning of a broad chapter than a part of the Wikipedia summary paragraph on the topic? Because it is free to edit worldwide, statistically everything is said better than some guy can say it.

I see the following options:


copy and reword
copy and cite
copy and reword badly i.e. explain in my own terms
study the topic for years, live healthy, then copy and reword into better form
something else


Which one is recommended?
You should write your own introduction so it represents what you are going to cover in your essay / report / thesis.

Just taking an introduction and referencing it to avoid plagiarism, will not usually represent your activity very well.