Answer: Broad, flat teeth for grinding.
Step-by-step explanation:
Bison are large herbivorous mammals. These belong to the family of Bovidae. They create habitat on the Great Plains and grassland for many different species. Bison are called a keystone species. As the bison forage they cause aeration of soil. This promotes plant growth. They have broad, and flat teeth which help them to grind food. These mammals appear in herd which helps in maintaining a balanced ecosystem.