What does the speaker suggest if someone is not feeling well?

The suggestion to visit a doctor is appropriate when someone is not feeling well because a doctor has the expertise to evaluate health issues and provide professional medical advice or treatment. This option implies a proactive approach to health concerns, emphasizing the importance of seeking medical attention when necessary. Visiting a doctor can lead to proper diagnosis and a tailored treatment plan, which can be crucial for recovery. Other choices, while potentially beneficial in different contexts, do not directly address the underlying health issue as effectively as consulting a medical professional. For instance, calling a friend could provide emotional support, resting at home may offer comfort, and taking a walk might help clear the mind, but none of these replace the need for medical assessment when someone’s health is at risk.