【正确答案】 B

【答案解析】解析：从“skill-based exercise increases the formation of connections in the brain making thebrain better able to process information．”可知。

【正确答案】 A

【答案解析】解析：从“And children who engage in regular physical activity do better in school than theirinactive classmates”可知。

【正确答案】 A

【答案解析】解析：从“Inactivity may also have negative effects on mind and body alike．mind is body,andbody is mind．”可知。

【正确答案】 A

【答案解析】解析：文中提到从事体育运动的人更善于应对心理挑战，这是因为Physical exercisesincrease the amount of certain brain chemicals that stimulate growth of nerve cells，故A正确。

【正确答案】 C

【答案解析】解析：从“The most beneficial forms of exercise engage both．”可知使身心都得到锻炼的运动是最有益的。