Which component of exercise primarily strengthens your heart? a.)flexibility b.)strength training c.) cardio d.) resistance training

Cardio is the component of exercise that primarily strengthens your heart

Explanation:

An active lifestyle can fight heart disease. Heart health is critical for overall health. Cardio training plays an important role in strengthening our heart that means the heart does not need to work hard to pump blood. In order to keep our heart strong and healthy it is highly recommended to perform cardio training at least two times a week.

answer; (c); /out to the side and directly under the dogs neck.

the answer is false, i know this answer is late but its for anyone else that needs it.