Which of these patterns do writers use to organize nonfiction texts?

introduction, preface, and list of resources
discussion, detailed description, and grouping
positives and negatives, list of resources, and examples
definition, classification, and advantages and disadvantages

definition, classification, and advantages and disadvantages

Explanation:

Definition

During this part of the text, the writers will give a brief introduction to the topic that they want to cover. They will give a definition toward a certain phenomenon and make the readers understand the reason why the writers want to analyze it in their writing.

Classification

In this part, the writers will arrange their ideas into several classes or groups. The purpose is to make it easier for the readers to understand  the information that they provide .

Advantages &Disadvantages

Even though this is more common in a persuasive text, some persuasive text can be considered as nonfiction. (if they rely on facts and logic as a method of persuasion). In this part, the writers will try to convince the readers on how their perspective in a certain problem is more advantageous compared to other writers' perspective on the topic

answer: fact: italy has over 300 islands ranging from extremely small uninhabited islands to the huge island of sicily.

explanation:

opinion: italy has way to many islands