Answer:
Cardiorespiratory endurance
Step-by-step explanation:
Without a multiple choice to choose from, this is the best answer I have for you.
Cardiorespiratory endurance strengthens your heart a ton. Simple vigerous exercises such as running, jumping jacks, etc. are very beneficial to your heart. Think about it, if you go on a half mile run everyday for a week, the next week your body has the endurance it needs to run the extra mile, (see what I did there?) Anyway, in my opinion Cardiorespiratory endurance would benefit the heart the most out of the Five Fitness Components.
Let me know if I helped! Have a lovely rest of your day.