Are based on hazard identification and risk analysis yes or no ?

Yes, it is an appraisal that enables locales to inspect and comprehend it's dangers and vulnerabilities to perils and how the effects may change as indicated by the time of the event, season, area, and other group elements. It allows examining the treats of the hazard. 

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.

Ithink it true i might be wrong so don't take my word that its true.