Farmers like to grow crops in alluvial plains because a. alluvial plains have fewer rodents and other animals that eat crops b. alluvial plains’ steep hills drain off unwanted water c. alluvial plains get more sunshine than other areas d. alluvial plains contain rich, fertile soil deposited by a river or rivers

alluvial plains contain rich, fertile soil deposited by a river or rivers

Explanation:

The predominantly flat areas on the banks of rivers, where there is a strong accumulation of sediment, have always attracted human societies because of their fertility. These areas are called flood plain and are considered privileged spaces of occupation for the planting of crops that demand a lot of water, such as rice.

 The most striking feature of alluvial plains is the fact that these areas are naturally susceptible to flooding. In times of flood, the fluvial channel overflows and floods the region of the plain. With the overflow, canalettas are formed in the banks of the rivers and deposits of sediments that spread by the plain.

D. alluvial plains contain rich, fertile soil deposited by a river or rivers

Explanation:

I would say alliances and nationalism because nationalism only encouraged countries to go to war and prove that they were the best most powerful country around and in terms of WWI, nationalism led to strong dedication to the army and just keep most countries in the war longer than they should have been in it. Alliances were significant in the exact beginning of the war and the scale to which the war was fought. The many (secret) alliances led to austria-hungary and Serbia to sorta threaten each other, which brought Germany in, then France, etc.