Cause and effect, compare and contrast, order-sequence and problem-soultion
A good way to intensify meaning in the conclusion of a speech is to use an example.
Giving the audience an example helps the audience remember the importance of what you are saying and can help intensify the meaning. While a long story might capture the audience's attention, it would be something that would serve better in another part of the speech. A conclusion should not include any new information and should simply summarize what you have already said. It may also call your audience to action.
ROBBERY AT A SHOPPING MALL
On July 19th, 2019 in chennai a robbery tool place in the most leading and popular shopping mall in chennai at 3:00 AM.
The next day the police started their investigation and found out that they have robbed over 50 lakhs worth of good.
The faces of the thief's were not visible properly as they we covered.
Police are trying there best to catch them.
this may not be 100 words you can add on if needed.
I think 5. should be the 3rd option, but 5 and 6 look good. I am not sure about 7, sorry >.<