Rivers play a central role in the lives of communities in Arunachal Pradesh for:

The correct answer is: d) All of the above

Rivers play a central role in the lives of communities in Arunachal Pradesh for irrigation, transportation, and cultural practices.

• Irrigation: Rivers provide water for irrigation, which is essential for growing crops. In Arunachal Pradesh, agriculture is the main source of livelihood for many people, and rivers are a vital part of the agricultural system.
• Transportation: Rivers are also used for transportation. In many parts of Arunachal Pradesh, rivers are the only way to travel between villages. Rivers are also used to transport goods and supplies.
• Cultural practices: Rivers are also important for cultural practices. In many cultures, rivers are sacred and are believed to be home to spirits. Rivers are also used for religious ceremonies and rituals.

In conclusion, rivers play a central role in the lives of communities in Arunachal Pradesh for irrigation, transportation, and cultural practices.