Which is one current theory on the reason for the decline of the Indus river valley civilization?

a. migrations of it's people to china

b. flooding

c. volcanic eruptions

d. foreign conquerors

"Flooding" would be the option as to the reason for the decline of the Indus river valley civilization, since they relied heavily on rivers in order to grow their crops, and too much flooding made farming extremely difficult.

Correct answer choice is:

B) Flooding

Explanation:

Indus Valley Civilization is also named the Harappan civilization after Harappa, the first of its places to be shoveled in the 1920s, in what was then the Punjab region of British India. The invention of Harappa, and soon after Mohenjo-Daro, was the peak of work beginning in 1861 with the establishment of the Archaeological Survey of India in the British Raj. Mining of Harappan places has been continuing since 1920, with significant discoveries happening as newly as 1999. This Harappan civilization is seldom called the Developed Harappan culture to recognize it from the cultures rapidly heading and succeeding it.