When a speaker refers to the audience as "brothers and sisters," they are 'breaking the ice' and making the audience feel closer to the speaker. It helps make the audience members and the speaker feel welcome.
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They would need to be creative and be good with details. I'm big on details so it's my opinion, but they do need details and a good story line that would make sense. They'd need to be good with spelling and grammar and all that fun stuff. Hope this helped a little but!!