下列自然资源,全部属于可再生资源的是( )
A:石油、森林、煤炭、太阳能
B:阳光、土地、水、草原
C:铁矿、天然气、铀矿、阳光
D:森林、水、天然气、铁矿
As is known to us all, taking exercise is b____ to our health.