Answer:
To arouse the curiosity of his listeners to gain their attention
Step-by-step explanation:
In order to grab the attention of your audience when giving a speech, what determines whether people will sleep over your speech or will be interested in the speech is your introduction. This is where you want to grab the attention of your listeners and make them curious to want to hear more. Hence the reason for Chati's introduction is simply to arouse the curiosity of his listeners in order to gain their attention.