Participation in has a higher risk of injury than participation noncontact physical activity. a. strength training b. collision sports c. endurance exercise d. flexibility training

C. collision sports same thing as saying contact sports such as football is a collision sport

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b