Answer:
Mountain Ranges.
Explanation:
The natural boundary which shielded the Indus and Ganges Valleys from invaders to the north was mountain ranges. The world's tallest mountains that stood on the north of the Indua valley served as a guard to protect the Indus and Ganges valley from being invaded.
<u>Indus Valley is surrounded by the world's tallest mountain range of </u><u>the Hindu Kush, the Karakorum, and the Himalayas in the north.</u><u> Indus and Ganges valley form the most fertile landforms.</u>
Thus the correct answer is that the natural boundary of mountain ranges guarded Indus and Ganges Valley from being invaded.
<span>Most American values appear to have been tossed out the window. I think that is at least part of the reason why we are having such a horrible economy.</span>
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Since it lives in full light of the sun, it is considered luminous and shares characteristics with air and fire. Through its detachment from earth it represents spirit and soul. Dante has called the eagle of 'bird of God', while Jung defines it merely as height.
