Manifest destiny led to the United States' westward expansion because Americans believed that they deserved all of the land, and that the expansion of the US was inevitable.
Answer: Cerebrum. explanation: the cerebrum enables functions like vision, hearing, and other senses.
It is now believed that the largest contributing factor to the decline of the Indus Valley civilization was an outbreak of disease--since there were no treatments and the density of the civilization led the disease to spread very quickly.
