Hello there!
The type of exposition showed in this paragraph is the illustration/example writing.
Argument:
A writer can use different types of evidence to demonstrate the author's purpose of the text. This genre of writing is used to illustrate some details or examples of the topic within the text, this type of essay/text should include some persuasive and argumentative phrases, so that the reader can understand the message and think the same way as the author.
In this paragraph, the author includes some persuasive comments saying that the restaurants sometimes tend to show us in their menus the most calorie-laden meals that keep us gaining weight.