How are Leeches helpful to humans?

(I'm doing a paragraph on this so I need help ASAP!)

Morning how ur day and quick question who started the civil war?

In the mid-1800s, how did american indians often react to the us government signing treaties with tribal chiefs to establish reservations? many american indians did not accept the treaties and resisted relocating. many american indians fought for land taken away by the dawes act. many american indians bought land in oklahoma from white settlers. many american indians accepted the treaties and relocated voluntarily.

Which scenario best illustrates the principle of popular sovereignty?