Answer:
It was caused by an H1N1 virus with genes of avian origin. Meaning, it came/spread from birds such as North American and wild.
Explanation:
Settlement houses were run in part by client groups Settlement houses were run in part by client groups. They emphasized social reform rather than relief or assistance. (Residence, research, and reform were the three Rs of the movement.) Early sources of funding were wealthy individuals or clubs such as the Junior League.
Well, depends on what the events ARE.
One of the main reasons why union membership declined during the 1920s is because the Great Depression hit, which laid off many people from there jobs and therefore made unions worthless for many.