What changes in lifestyle did ancient Native Americans have to face with the decline of megafauna?

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

the aztecs painted books and kept records