" Lee ordered this army to evacuate the positions they had held east of Richmond and Petersburg for the last nine months when he learned of the disaster at Five Forks. The army was to pull out that night, April 2, 1865, and head west. Lee hoped to be able to get to the vicinity of Greensboro, North Carolina with his army, and unite his command with that of Joseph E. Johnston, and continue the fight. He was cut off and compelled to surrender at Appomattox. "
        
                    
             
        
        
        
Answer:
a)the Erie canal
Explanation:
From the provided information in the question, it is "the Erie Canal" that fits that information perfectly. As Erie Canal is a Milestone in U.S. Transportation, with a 363 miles long. The construction started in 1817 and got completed in 1825. 
It connected the Great Lakes region with the Atlantic coast and improved transportation into the interior of the United States.
It also lowered the cost of transporting goods by ninety percent 
It also made New York more populous and became the urban Empire State.
 
        
             
        
        
        
Answer:
Civil War Begins. At 4:30 a.m. on April 12, 1861, Confederate troops fired on Fort Sumter in South Carolina's Charleston Harbor. Less than 34 hours later, Union forces surrendered. Traditionally, this event has been used to mark the beginning of the Civil War.
Explanation:
 
        
             
        
        
        
Answer:
. The usually modest structures are built to shelter shepherds and for cheese . hope this helps