A single session in Google Analytics automatically times out after 30 minutes by default. If a user visits a website and does nothing on the website then Google Analytics ends that session just as it reaches 30 minutes. If a user leaves the website or closes the browser before 30 minutes then also a session is ended.
This question is a part of the Assessment 1 section of the Advanced Google Analytics Certification course. You can find the answers with full explanation for the first Assessment in our Advanced Google Analytics Assessment 1 Answers page or you can check out the answers for all the assessment questions in our Advanced Google Analytics Assessment Answers page.