This site will probably help you, hope this help.
http://www.shmoop.com/esperanza-rising/marta.html
B. The cities were very crowded
Everyone was in contact with each other
Answer:
Slavery
Explanation:
States' rights regarding slavery was one of the main issues dividing the North and South that led to the Civil War.
More than 200,000 men died during the trench warfare.
Infestation. (Look it up.)
No mans land.
Construction wan manual and painful.
So that america could claim a portion of there land within the reach of the U.S. (later called texas
