What happened to the bison herds? A. They moved east in search of food.
B. They were sold to cattle ranchers in the West.
C. They were moved to the reservations with the Native Americans.
D. They were killed for their meat and hides.

D

Explanation:

Mass destruction of the once great herds of bison began. West of the Rocky Mountains, bison (never in large numbers) disappeared. Native Americans market hunters concentrated on cow bison, because of their prime hides for trading. . . An estimated two million bison were killed this year on the southern plains.

answer; if congress didn't act on certain requests;

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.