Which topic should appear in a conclusion?

Answer 1

The main findings or results of the research.

Answer 2

reasons and examples
a transition
the ideas you want your readers to remember
an introduction

Answer 3

The main findings or results of the research, the ideas you want your readers to remember, and a transition can all be included in a conclusion. However, an introduction should not be included in a conclusion as it is typically found at the beginning of the essay or research paper.