The topic of a piece of informational writing refers to the main subject or focus of the writing. It is the central theme or idea that the writer intends to convey to the reader. In other words, the topic is what the writing is about. To identify the topic of a piece of informational writing, you can look for the subject or focus that the writer frequently discusses or addresses throughout the text. This can often be found in the introduction or thesis statement of the writing. Therefore, the correct answer is C.
