Without the text excerpts provided, I cannot specifically compare and contrast their text structures or speculate on why the authors chose to present information in a certain way. However, generally, authors may choose different text structures based on their goals, audience, and content. For example, an author might use a chronological structure to convey a narrative or a cause-effect structure to explain relationships between events or ideas. The choice of text structure can help the author effectively convey their message and engage the reader.
