Use the map below to answer the following question: a map of the great wall of china of qin dynasty. the red lines indicate the qin era wall and stretch from the northern shore of the yellow sea west into the gobi desert and mountainous regions south of the gobi desert. the yellow line indicates the current border of china. it lies to the north of the red line and stretches from the right to left border of the map. © 2012 ksyrie creative commons, attribution-share alike 3.0 unported the red lines represent improvements made to a large structure by the qin dynasty. what was the structure? great wall of china forbidden city yellow river dams mandarin palace

The great wall of china

Explanation:

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© 2012 Ksyrie Creative Commons, Attribution-Share Alike 3.0 Unported The red lines represent improvements made to a large structure by the Qin dynasty. What was the structure? Great Wall of China Forbidden City Yellow River dams Mandarin palace

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.

this isn't a question and if you're going to list things be kind and use commas.