If the main point is about something that is not funny then it will distract the reader but its about all the same topic it will make it interesting to the reader
The one you selected is the right choice. The first choice.
I would say true. An eyewitness is a person who observed the crime firsthand.
Explanation:
Think of the abstract as like a short summary of the paper. They usually preface all of the content in the paper and just talk about the findings and the study in a very broad concise sense. The introduction on the other hand is usually the very beginning of the paper and actually dives headfirst into the content with specifics.