The author’s purpose for including this paragraph includes:
- to inform readers about the location: The paragraph provides descriptive details about the setting, including the presence of the playground and day-care center.
- to entertain readers by showing how dramatic the situation is: The contrast between the operation and the innocent setting of children playing adds an element of drama and tension to the narrative.
The other options (to express his thoughts clearly, to persuade readers to become scientists, and to encourage readers to protect children) are not explicitly supported by the content of the paragraph.