The answer would be Agriculture
I know this because I have had a test with same question and it was correct
Hope it helps
The need to maximize a limited access to water for both human consumption and agriculture might explain the fact that both Peruvian cultures - both agricultural civilizations - used underground aqueducts to collect and transport water to reservoirs that were located nearby. For instance, the rivers that supplied the Nazca people did not carry any water during part of the year, so they conceived an innovative system that allowed them to collect the water from the rain that filtered through the ground into underground galleries, which allowed them to prevent the loss of that water - they inhabited a desert area, after all. The Chavin civilization also inhabited arid and extensive coastal areas that required ample and complex irrigation systems, hence the importance of saving and transporting water.
They provided British factories with raw materials
According to Karl Marx, the economic ideas behind socialism would lead to a revolution because when the working class of people would revolt against the upper class which is known as the burgeoise, that would be the only way of achieving true socialism.
The civil war began on April 12, 1861. It started in Fort Sumter. It ended on <span>May 9, 1865.</span>
