Answer:
The Great Wall of China is an ancient wall in China. The wall is made of cement, rocks, bricks, and powdered dirt. It was built to protect the north of the empire of China from enemy attacks. It is the longest structure humans have ever built.
Explanation:
The effect of greenhouse gases on the Tundra ecosystem will cause Increased greenhouse gases will increase the overall average temperature of the region, resulting in the melting of the polar ice.
The tundra is a scientific term to refer to the polar geographic region characterized by:
- Low growing vegetation.
- Frozen subfloor.
- Absence of arboreal vegetation.
- Soils that are covered in moss, lichens, snow, or ice.
- In some places they are swampy.
This region is being affected by greenhouse gases because they heat the poles, cause a thaw, and the water level is rising making the tundra an exclusively marshy region.
Learn more in: brainly.com/question/2018762
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Most early agricultural societies were located in areas like Mesopotamia (which around Iraq today), so it wasn't very mountainous, so that answer option is incorrect.
Most of these agricultural societies were located in river valleys because you need water to grow crops, so the last answer option is incorrect.
People grew many different crops at this time. It is very unlikely that they all ate the same food. I don't see why farmers would have struggled to vary the crops, so this context doesn't make much sense.
Farmers began to grow better crops, so villagers ate better quality food makes the most sense. Agriculture yields good, natural food, so the villagers will be eating better quality food because the agricultural civilization was advancing.
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i believe it's D. Protect citizens from excessive power of the Federal Government
A
They reduced tension in the Middle East
