Final answer:
Gardening, dancing, and brisk walking are moderate physical activities according to the 2018 Physical Activity Guidelines. These activities allow you to talk but not sing, indicating their intensity level. Physical exercise includes all activities that improve or maintain health and fitness.
Step-by-step explanation:
Gardening, dancing, and walking briskly are examples of moderate physical activities. These types of activities are those in which you can talk, but not sing, during the activity. This definition aligns with the 2018 Physical Activity Guidelines which categorize physical activity based on intensity and the impact they have on breathing and heart rate.
The emphasis on regular physical exercise, including moderate activities, is crucial for improving health and reducing the risk of chronic diseases, as well as contributing to weight maintenance. Physical exercise is any bodily activity that enhances or maintains physical fitness and overall health, which can include everyday activities such as household chores.