Which of the following is an example of a health habit?

Daily exercise is a prime example of a health habit because it emphasizes a consistent and systematic approach to maintaining physical fitness and overall health. Engaging in exercise on a daily basis promotes cardiovascular health, strengthens muscles, boosts mental well-being, and helps in managing weight, making it an integral part of a healthy lifestyle.

In contrast, while all the other options are beneficial to health, they do not inherently convey the same level of daily commitment implied by "daily exercise." For example, weekly yoga classes and regular doctor visits are important, but they denote less frequency. Healthy eating is crucial for overall well-being but is a broader lifestyle choice rather than a specific consistent action performed daily. Thus, choosing daily exercise highlights the importance of routine physical activity as a key health habit.