Patrick Henry's purpose for his speech was persuade the people to go to war with England.
His intended audience is house of representatives. He harnessed the power of words through his tone and the words he uses.
persuasive writing has a major role in businesses like in news paper adds for things that they try to get you to buy. they want you to buy that for no matter the price. they will put colorful colors on it to make it look appeasing to the eye.another way you could use persuasive writing is to get someone to agree with you or to be on your side or to work a deal.