Which of the following sport can be most beneficial in achieving cardiovascular fitness? football, soccer, baseball, or golf.     need answer

Ihave a really high metabolism and only weigh 70 pounds (13 almost 14). people always ask me two questions: do you ever eat and how do you eat so much and stay so skinny.i am worried that a high metabolism wont me forever. what are some safe steps i can take to maintain being fit. (also, i already work out i am a dancer so i get cardio a lot)

Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?