Use the map below to answer the following question: A map image showing the location of cities in modern-day Pakistan is shown. Most cities are located in the northeast of Pakistan. The Indus River originates in northeast Pakistan and flows southwest toward the Arabian Sea. Feeding into the Indus River are multiple secondary rivers such as the Shelum, Chenob, and Kabul rivers. In the middle of the country is the Suleimain Mountains and in the southeast is the Thar Desert. In the southwest is the Dasht River, but no major city is located near this river.
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Which landform made the area indicated on the map an ideal location for civilization to develop, and why?

The placement of the Himalayan Mountains kept it free from monsoon rains.
The length of the Indus River made it easy to use for transportation.
The Indus River caused the formation of a fertile valley between mountains and the desert.
The Himalayan Mountains made it impossible for attackers to cross the nearby mountain range.