Why is poverty threshold important in terms of welfare

The U.S. Poverty Threshold is based on household size with the inherent assumption being that it is more economical for two or more people to live in a household because they can share some expenses.  

Explanation:

the ss was the main organization responsible for the genocidal murder of around six million people of european ethnic minorities, essentially jews, in the holocaust. the members of all its branches committed war crimes and crimes against humanity during the second world war (1939-1945). likewise, the ss were involved in commercial enterprises and exploited the inmates of the concentration camps as slave laborers.

the tortures and assassinations committed by the ss were the result of an ideology developed long before the armed conflict, this ideology was based on the racial supremacy of the germans over the rest.

i believe it is the second one.   if correct plz mark brainliest.