I know for a fact that it was build to guard against the mongols, i'm not so sure about these two tho. It's the longest human made structure at more than four thousand miles, I want to say that two is also applicable
So the answers are 1,2,4
Answer:
Explanation:
Regions change over time because the people that come and change that climate by coming and creating a new environment. So they might start building mines and big cities to match the regions changes. When people come they might not try and change there region or they wont care and they will change it. Location and climate have large effects on income levels and income growth through their effects on transport costs, disease burdens, and agricultural productivity, among other channels. Geography also seems to affect economic policy choices. Economic growth in a cross-section of countries.
The correct answer is C) the piano.
Henry Cowell was an American pianist during the early to mid 20th century. Cowell was known for the use of new and revolutionary ideas in the music industry. He spread these ideas to other musicians and went overseas to Europe multiple times to share his expertise with other musicians.
He went too far with his revolutionary ideas.
Answer:

Explanation:
The New England colonies were located at the north of the colonies.
There was rocky soil and a harsher climate, as well as access to lumber, waterways, and good harbors.
Since the soil wasn't fertile and the climate wasn't warm, they couldn't farm any crops, including cash crops like tobacco, or have plantations. Since they had wood and access to the oceans, the New England colonies took up <u>shipbuilding.</u>