Answer: d
The respiratory and circulatory systems bring oxygen and nutrients to the cells. The respiratory and circulatory systems work together to maintain homeostasis. The respiratory system moves gases into and out of the blood. The lungs contain the bronchi, bronchioles, and alveoli.
Explanation:
Self-depiction is a very important factor of confidence, happiness, and attitude.
Remaining physically fit will make the person more "attractive" and likable by opposite genders.
Physical activity is necessary towards happiness, confidence, and just health.
Endurance is the answer i think you're looking for.
