The first step in a hazard vulnerability assessment is?

The answer to your question,is: The first step in a hazard vulnerability assessment is categorizing assets and resources or capabilities in a system. The next other steps are: quantifiable value and the value of the resources; determine threats or vulnerabilities to every resources.

Both the han and the roman empire decline as a result of social unrest during their collapse.

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.