Final answer:
The answer explains the levels of intensity in physical activities based on heart rate and ability to carry on a conversation.
Explanation:
Moderate: While performing the physical activity, if your breathing and heart rate is noticeably faster but you can still carry on a conversation, it is probably moderately intense.
Vigorous: If your heart rate is increased substantially, and you are breathing too hard and fast to have a conversation, it is probably vigorously intense.
The Talk Test: A person doing moderate-intensity aerobic activity can talk, but not sing, during the activity. A person doing vigorous-intensity activity cannot say more than a few words without pausing for a breath.
Learn more about Physical activity intensity levels here:
https://brainly.com/question/1673413
