That's the way it is with a lot of things because everything is connected是什么意思,it是什么成分?请大家快些帮我,有it作定语从句的吗

That's the way it is with a lot of things because everything is connected是什么意思,it是什么成分?
请大家快些帮我,
有it作定语从句的吗

it作宾语补足语.
顺便说一下,一个词永远做不了定语从句,IT最多也就是个定语从句的引导词,但它不可能是
it不能作定语从句