Chati is giving a speech about food from Thailand, where he was born. His audiences consists of his classmates, most of whom grew up in the United States. He introduces the lecture by mentioning that one of the foods he misses most from Thailand is a fruit called durian. He says, "Many people from Southeast Asia, me included, call durian the king of fruits, both because of its large size and its delicious flavor. However, the sharp spikes covering its skin is not the reason why durian is banned from hotels and public transportation in some places." What is Chati's purpose with this introduction

To arouse the curiosity of his listeners to gain their attention

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.

delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.