Question

英语句子成分分析（句式.从句）？

Call this distinction the definitive rule of sane environmentalism, which stipulates that combating ecological change that directly threatens the health and safety of people is an environmental necessity.

Answer 1

call带了双宾语。
which 引导定语从句。
定语从句的谓语动词带了宾语从句。
宾语从句的主语是combating ecological change，然后change 又带了一个定语从句。宾语从句的谓语动词是is，后面，也就是最后三个字是表语。