Answer:
A. slash and burn
Explanation:
They developed resilient breeds of crops such as potatoes, quinoa and corn. They built cisterns and irrigation canals that snaked and angled down and around the mountains. And they cut terraces into the hillsides, progressively steeper, from the valleys up the slopes
The Selective Service Act was a means of "<span>c. drafting young men for the military forces," since there were too few men willing to volunteer for the military in times of war. </span>
Oarsmen and sailors, boat builders, sail makers, fishermen and farmers
One way in which World War 1 changed warfare was "<span>C. By using tanks, airplanes, and machine guns," since these changes were part of what made World War I the first real "total war". </span>
