Which are thought to have contributed to the decline of the indus valley civilization choose all that are correct a the indus river and its tributaries changed course b soil became too salty for crops to grow c cities were destroyed by rage fire d people had to leave because sandstorms were blanketing cities e people moved to more fertile regions of the subcontinent

The correct answers are B) soil became too salty for crops to grow. E) people moved to more fertile regions of the subcontinent.

The options that could have been the reasons that contributed to the decline of the Indus valley civilization were the following: soil became too salty for crops to grow and people moved to more fertile regions of the subcontinent.

The Indus Valley was one of the oldest civilizations on planet Earth. Like other ancient civilizations such as the Sumerians or the Egyptians, they settled in next to the banks of a river for the many benefits they had to irrigate farm fields and grow crops. The Indis Valley people settled in next to the Indus River. They prospered for a while due to the flooding of the river and the perfection of agricultural techniques. However, the soil became too salty for crops to grow and people moved to more fertile regions of the subcontinent. And they finally disappeared.

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.