Yasir uses different styles of speech, or codes, when speaking to teachers and when speaking to his friends. according to the text, yasir most likely uses a(n) code when speaking to his friends.

He uses a casual style

Explanation:

Casual style is the most common type of speech used among friends. Vocabulary and expressions here are relaxed and informal, and speakers often use slang to communicate their ideas. Casual style is not only used in an oral way, it is especially used by young people when they send tex messages. In a chats, teenagers can even abbreviate words and sentences in a few letters. This makes the communication process, (among teens) much easier, shorter and direct.

every four years the american people choose a new president, and 1988 is one of those years."