C. It provides background information about volcanoes that gives the
essay context.
Explanation:
Option C is the statement that best explains how paragraph 1 makes the essay clearer. The paragraph gives a background information that reveals people's attitude during volcanic eruptions and the need for preparedness. This background information makes the context of the essay clearer as the author shows how the eruption occurs. The author reveals that volcanic eruptions are scary but the actual process or path it takes is a simple, natural process.
