Which sentence best demonstrates the language required of an argumentative speech? to improve their games, chess players must face skilled opponents and attempt novel strategies. chess players often study the strategies and famous matches of well-respected chess masters. chess players often make the mistake of playing their peers and less-skilled opponents just for fun. the only way for chess players to get any better is by learning from the pros and testing out risky moves.

To improve their games, chess players must face skilled opponents and attempt novel strategies.

Explanation: An argumentative speech is a speech in which the speaker attempts to persuade his audience usually on a controversial issue. The first option is the best example of argumentative speech because it gives a reason or an argument (improve their games) and uses the word "must" that expresses obligation. The other sentences mostly express facts or curiosities about chess players.