Which of the following sports is the best choice for a person who is not physically fit? (apex)

Explain how unhealthful weight loss or weight gain can lead to further weight loss or weight gain.

How can a person  best  reduce the risk of injuries on the road?  

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?