Answer:
Can you pass the salt?
Move out of my way!
Can you turn the volume up?
Go away!
Explanation:
An imperative sentence is just a command. As you should know a command can end in all sorts of different punctuation based on how the command is phrased. If someone is agitated, the command "Can you turn the volume up?" may turn into "Turn the volume up!"
Introduction: hook, call to action.
Body paragraph: claim, evidence
Conclusion: summary, rebuttal
I would agree with you - the conclusion should leave readers with an important thought at the end.
This thought should never be new, or opposing to the previous ideas you had been writing before. It also shouldn't be confusing, but quite conversely - it should explain everything and put everything in place.
