Which of the following is an example of responsible use of technology?

The correct answer encompasses a broad understanding of responsible technology use that includes various aspects of interacting with technology and others. Tracking your physical fitness using an app represents a personal responsibility towards health management, utilizing technology for self-improvement in a constructive and beneficial manner. Teaching a friend or family member how to navigate social media reflects a commitment to sharing knowledge and helping others engage with technology safely and effectively, which is vital in today's digital landscape. Responding to fellow users with compassion and dignity highlights the importance of fostering a respectful online community, promoting positive interactions that discourage negativity and hostility. All of these actions reflect responsible use of technology, emphasizing both personal development and the ethical treatment of others in digital spaces. Therefore, the comprehensive nature of option D, which includes all of these specific examples, solidifies its correctness.