Answer:Its b I tried a but it said b was right
Explanation:
A physical change chamges the substances apperance, but a chemical changes the chemical formula of a substance. Hope this helps!
Considering the passage above the completed one is this:
After the passage of the Homestead Act, settlers flooded to the Great Plains, where lumber was scarce. Barbed wire enables the settlers to fence in their lands.
As a result, the movement of Native Americans and cattle drivers was severely restricted, and the era of open range came to an end.
Hence, in this case, the correct answers are:
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The agricultural revolution is also known as the neolithic revolution. It started in a region of the middle east known as the fertile crescent and subsequently spread throughout the globe. Experts have different opinions on how this may have occurred. Some suggest cultural diffusion but others disagree. There is how ever a strong argument for a theory that suggests that farmers themselves migrated from the region and displaced existing hunter gatherer populations in Europe. The most appropriate answer in this case would be c.<span />
