Final answer:
Teens should engage in at least 60 minutes of physical activity per day.
Step-by-step explanation:
The 2018 Physical Activity Guidelines recommend that teens should engage in at least 60 minutes of moderate to vigorous physical activity every day. This can include activities such as brisk walking, biking, dancing, or playing sports. It is important for teens to get regular exercise to maintain good health, strengthen muscles and bones, improve cardiovascular fitness, and reduce the risk of chronic diseases.