Answer:
D-Competition among European powers for resources and economic dominance
Explanation:
Answer
Both farming and drought
Explanation
Dust worms arise when a gust or a sudden strong rush of wind or other strong winds blows loose sand and dirt from a dry surface. Then Fine particles are transported by saltation and suspension, a process that moves soil from one place and deposits it in another. Generally A dust storm is a meteorological phenomenon common in arid and semi-arid regions which occurs when strong winds lift large amounts of sand and dust from bare, dry soils into the atmosphere
Smallpox was had the most dramatic effect on Native Americans. It was quite sad, actually. They were given blankets and clothes that were already infected with smallpox.
