2. Which element should be included in a summary of a text?

the central ideas
other texts on the same topic
the reader's conclusions
interesting metaphors

The element that should be included in a summary of a text is the central ideas.

The element that should be included in a summary of a text is the central ideas. A summary aims to provide a concise overview of the main points and key concepts discussed in the text. Therefore, it is essential to include the central ideas in the summary to accurately represent the content of the text. Other elements such as other texts on the same topic, the reader's conclusions, and interesting metaphors may not necessarily be included in a summary as they might be specific to the reader's interpretation or not directly related to the main points of the text.