Can anybody tell me or explain what does red line mean in social studies

What is the meaning of red line?

to cross the red line

The Red line, or "to cross the red line", is a phrase used worldwide to mean a figurative point of no return or line in the sand, or "a limit past which safety can no longer be guaranteed."

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answer; ///the declaration of independence;

both focus ón people who behave in a risky way and çause accídeñ both explaín how to púrchase insurance añd cover the costs of premium. both describe what happened when consumers fail to pay their premíums in time