Neither sounds good to me. I suggest an introductory paper.
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Anonymousintroduces and explains a topic.I don't see why that couldn't be called an essay.
Anonymous Hello. There is a kind of scholarly paper in Japanese that introduces and explains a topic.I guess that is "research paper" or "research report".
Anonymousexplain'explain a subject', not 'explain about a subject'.abouta complex subject in a simple manner so that researchers and students who are not familiar with the subject may understand it