Powerful wave or words from the story
an advertisement
An advertisement could be said to represent a persuasive argument inasmuch as it develops a premise or set of premises (more often than not, not very solid or logical, and sometimes even unethical) and reaches a conclusion by which it intends to persuade a certain audience to consume the products or services being advertised.
A common noun.
A proper noun would be a word that always has to be capitalized , like names of places , people and such , therefore that would make it a common.
