Final answer:
To identify the correct answer to the question about why or where someone left, refer to the relevant chapter section where correct answers are bolded, and use the available strategies to ensure the answer is reasonable.
Step-by-step explanation:
When answering the question "Do you know the reason why / where he left?" you should review the content from the chapter to identify the correct answers. The inquiry seems to be related to an exercise where you need to circle the correct choice(s). The phrase indicates that there may be multiple options and you are tasked with identifying the correct one based on context.
It's important to check your answers to these types of questions with the given resources, typically found in a "Before You Move On" section or similar review sections of textbooks or study guides. Correct answers are often highlighted or bolded to help students confirm their responses. Additionally, strategies to determine if an answer is reasonable can be used to validate your selection and reason through the question logically if the answer isn't immediately apparent.