which of the following names a technique a writer may use in an introduction to engage a reader in an explanatory text?

A. a diagram
B. a topic sentence
C. a thought-provoking question
D. a concluding statement

C. a thought-provoking question

C. a thought-provoking question

To determine which of the given options names a technique a writer may use in an introduction to engage a reader in an explanatory text, let's analyze each choice:

A. A diagram: Although a diagram can be an effective visual aid to support explanations, it is not a technique specifically used in the introduction to engage the reader.

B. A topic sentence: A topic sentence is a sentence that introduces the main idea of a paragraph or section. While it is an essential part of organizing a text, it may not be the most effective technique to engage a reader in the introduction.

C. A thought-provoking question: This technique is likely to be the correct answer. Starting an introduction with a thought-provoking question can capture the reader's attention and make them curious to learn more about the topic. It encourages active engagement with the text from the very beginning.

D. A concluding statement: A concluding statement is typically found at the end of a text or section to summarize key points. It does not serve the purpose of engaging the reader at the start of an explanatory text.

Therefore, the correct answer is C. A thought-provoking question.