【正确答案】
1、The moral foundations.
【答案解析】[定位] 由题干中的human society和depend on定位到文章末段第2句The relative few...moral foundations childhood should provide—and which progressive human society relies on.
[精解] 题目中的depend on与文中的rely on同义。rely on的宾语就是which的先行词the moral foundations。