Dorakey_Axbのプロフィール

"Peter is worried about his son, Eddie. Eddie spends most of his free time in front of the TV set. Peter thinks children should get outside and play ---- both for the physical exercise it provides and for the chance it gives them to learn about getting along with other children. " という英文中に二つ　it が現れますが、これらは何を指しているのでしょうか？