Final answer:
The passage exhibits complex sentence structures and the use of topic sentences as its text structures. These structures aid in enhancing readability and organization of ideas.
Step-by-step explanation:
One text structure in the passage is the use of complex sentence structures, which indicates that the text makes use of varied and intricate ways of combining clauses. This use of sentence variety can enhance readability and provide a more sophisticated writing style.
Another text structure evident in the passage is the use of topic sentences to introduce the main idea that is then developed in subsequent paragraphs. This helps organize the content and makes it easier for readers to follow the writer's thought process.
Additionally, references to things like 'Editing Focus' and the 'task as discussed in Section 1.5' suggest that the passage might be from an instructional text or style guide aiming to teach or remind the reader about writing strategies.