Usually, yes.
The youthful...: Introduction
The opposite of introduction is conclusion or ending.
Introduction is the paragraph(s) that starts a text, conclusion is the paragraph(s) that ends a text.
Conclusion.
Introduction is to conclusion as greeting is to a goodbye.
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The paragraph(s) between the introduction and conclusion are called body paragraph(s).
introduction that provides background for the reader
That would be 'introduction'.
Rejoin
Introduction - 1 pgraph 3 - 5 paragraphs explaining your thesis, and proving it Conclusion - 1 pgraph
Introduction