Native americans regarded many animals as sacred. but of all the animals on the great plains, which was rhe most essential to the Indians and their way of life? a. wolf
b. the bear
c. the many varieties of fish
d. the various herds of buffalo

d. the various herds of buffalo

Explanation:

Native Indians depended on the bison for their skin for the cloth and shelter and meat. The plains Indians live in a teepee as they live the life of a nomad. The Indians travel from one place to another in search of food and resources. The Plains Indians use hides (buffalo)for their blankets and beds.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering