Final answer:
The use of descriptive text structure in paragraph 1 likely serves to explain what urban gardens are and where they are located, using sensory details and descriptive diction to provide a clear introduction and understanding of the subject matter.
Therefore, the correct answer is: option D). It explains what urban gardens are and where they are located.
Step-by-step explanation:
Regarding how the use of a description text structure in paragraph 1 conveys the author's purpose, based on the provided information, it seems that the correct answer would be D). It explains what urban gardens are and where they are located.
Descriptive text structures provide a detailed account of a topic, which includes information about visual appearances, locations, sensory details, and potentially emotional contexts.
Considering that the text uses descriptive diction and sensory detail as mentioned in Section 17.6, it is designed to depict the nature of urban gardens vividly.
The description serves to educate the reader on urban gardens, making them understand what they are and their placement within an urban environment.
This is effective in setting a foundation for further discussion on the topic within the text, thus aligning with the purpose of explaining and introducing urban gardens to the reader.