The main idea of this source material is that a volcanic eruption kills thousands in Columbia.
<h3>What are source materials in writing?</h3>
Sources in a piece of academic writing are simply the materials from which the writer gathers ideas and information. It should be noted that print sources such as books and journals are the most frequently used sources in academic writing.
Source material are used to provide proof or support for your arguments or ideas, define or clarify points or, provide a point of view and to refute opposing ideas.
In this case, the article was about 20,000 people are feared dead after a volcanic eruption in northern Colombia. To summarize a source means to extract only the relevant points and conclusions of the source material.
Lastly, it should be noted that thus is a source material as it gives information about the eruption.
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