The correct answers are:
E. Massive flooding disrupted farming
C. A series of wars forced people to leave the area
The Indus River Valley Civilization, also known as the Harappan Civilization, extended from Afghanistan, Pakistan and northwest India.
Answer:
The colonies are a natural survival strategy. ... They're always close to water because the swallows build their nests from globs of mud they collect by the beak full.
Explanation: