It depends how your professor or teacher may look at it. In an Early Childhood Developmental Class, It would be argued that the answer is True. <span />
I think out of all the answers, it should be genetic testing
Cardio strengthens your heart muscle, increasing your stamina & tolerance. Strength training activities would build the muscles on your body. Your abdomen, limbs ect
The answer to the question would be if biking would be done for several days each week then be b. improvements in balance as well as cardiovascular health. Hope this is the right answer and would then be of help.