Final answer:
The fall of the Indus Valley civilization can be attributed to Persian invaders, decline in trade, and domestic issues.
Step-by-step explanation:
The fall of the Indus Valley civilization can be attributed to three factors: Persian invaders, decline in trade, and domestic issues.
Firstly, Persian invaders, such as the Achaemenid Empire, launched military campaigns in the region which weakened the Indus Valley civilization.
Secondly, there was a decline in trade, possibly due to shifts in trade routes and competition from other civilizations, which affected the economic stability of the civilization.
Lastly, the civilization faced domestic issues such as political instability, social unrest, and perhaps overexploitation of resources, leading to its eventual decline.
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