A parent or other trusted adult, such as a school counselor, could give great problem solving advice.
Eat colorful fruits and vegetables, like berries, broccoli, carrots, etc. Don't stare at a screen too close, and take a break every hour. Drink lots of water, and try to look far distance.
Regular exercises are the best way to prevent flexibility issues because it helps keep muscles healthy and in good shape. For that reason, it is not as probable for muscles to get torn down and for people to experiences with flexibility if they work out regularly.
Answer:
D
They're caused by repetitive force, such as jumping up and down or running long distances
Shane may eventually need letters of recommendation from professors.
