The words that descrive the noun agreement in the sentence are abstract, singular, common.
The noun agreement is abstract due to the fact that it conveys an idea, condition or characteristic instead of a concret object. It is also singular because it refers to one thing and in the example sentence it does not take the plural form. Finally, it is common since it does not apply to a specific person, place or thing, as in the case of proper nouns.
The primary focus of a persuasive speech is to persuade, be it a product or an event. Persuasion is necessary to encourage people to be interested in what you are talking about.
