Answer: Uhhhhhhh I haven’t a clue
Explanation:
Three reasons droughts caused Mayan civilization to fall
1:invasion
2.war
3.collapsing trade routes
I believe the answer is: <span>a continuous reinforcement schedule; a fixed ratio schedule of reinforcement
</span> a continuous reinforcement schedule refers to the process of reinforcing a desired behavior every time it occurs.
A fixed ratio schedule on the other hand , refers to the process of reinforcing a desired behavior after it occurs several time.
Answer:
The Plains Indians
Explanation:
Indian tribes from the Plains region used buffalo for shelter, food, clothing, and artworks. These Indian tribes include Comanche, Arapaho, Kiowa, Cheyenne, Blackfoot Crow, Lakota, etc. American Indian tribes survived on hunting and gathering practices in the Great Plains. They follow buffalo herds (bison) which allow them to travel from one area to another. They live in tipis made of hides of bison which protect them from winter and rains.
Answer:
Look left, then right, then left again
Explanation:
In the United States, they keep left. so when waiting to cross at an intersection, you look left, then right, then left again.