Question

what do archaeologists identify as one possible reason for the decline of the Indus civilization? Select all that apply (2)
A) the Aryans attacked and overran Indus cities
B)too many trees were cut down, leaving the Indus with no fuel.
C)the Indus experienced a devastating drought.
D) the Indus people migrated to a new region

Answer 1

According to me the first three options are partially correct. But their explanation is not clear.

Answer 2

The Indus Valley Civilization was found to be declined around 1800 BCE. Many archaeological resources suggest that main reason for the decline was the invasion of Aryans, a group of Indo-European tribe.  

Some other reasons for the decline were extreme climate change and migration of Indus Valley people.

The answers may be

A) Aryans attacked and overran Indus cities.

C) Indus experienced a devastating drought.

D) Indus people migrated to a new region (may be due to invasion or climate change).