The correct answer is "the subject or focus." In a piece of informational writing, the topic refers to the subject or focus that the writer is providing information about. To identify the topic of a piece of informational writing, you can look for keywords or phrases that indicate what the writing is primarily about. These can be found in the title, introduction, and subheadings. Additionally, you can analyze the content and main points of the writing to determine its topic.
The topic of a piece of informational writing is the subject or focus.