You decide to ride your bike for 30 minutes, raising your heart rate to the middle of your target heart rate zone. what type of activity is this an example of?

Cardio aerobic

Explanation:

Raising the heart rate uses a lot of oxygen and since it is increasing the heart rate, that means the heart is pumping blood at a faster rate than normal. Thus it is a cardio aerobic activity, where the rate is increased that burns a lot of oxygen . It also increases the metabolic system of the body and helps to maintain a healthy body.

none, its a machine