The natives became less settled and sedentry, the horses allowed them to hunt larger animals such as bison and buffalo. The tribes also became nomadic and moved around instead of staying put in one place.
Because of the balance and harmony between each part.
Hope this helps!! (:
Answer: im pretty sure its either A or D
Explanation: its obviously not B, and the producer gets a little amount, not even half of it. So its either A or D, i would choose A personally, but follow your gut i guess