Respuesta :
I think that there should be two right options. As for me these are : their shared language and culture. & the arrival of European explorers and settlers.
Correct answer:
their shared geography and climate.
The Cherokee were a large and powerful tribe that lived in a massive area in the northern and southern states of South Carolina, northern Georgia. The Iroquois were a league of six Native American tribes in Canada and New York. Both tribes shared similar geography and climate.