One major cause of the Civil War is slavery. The Northern political party blocked the expansion of slavery which caused conflict between the North and the South
<span>technological advances that lowered transportation costs dramatically</span>
Answer:
The Chavín culture also demonstrated advanced skills and knowledge in metallurgy, soldering, and temperature control. They used early techniques to develop refined gold work. The melting of metal had been discovered at this point and was used as a solder. The people domesticated camelids such as llamas.
Explanation:
