Rivers in Nagaland play a crucial role in:

The correct answer is: d) All of the above.

Rivers in Nagaland play a crucial role in irrigation, hydropower generation, and transportation.

• Irrigation: Rivers are used to irrigate crops, which is essential for agriculture in Nagaland. The state has a tropical climate with a long rainy season, but there is also a dry season when crops need to be irrigated. Rivers are used to bring water to fields during the dry season, which helps to ensure that crops have enough water to grow.
• Hydropower generation: Rivers are also used to generate hydropower. Hydropower is a type of renewable energy that is generated by the flow of water. In Nagaland, there are several hydropower dams that generate electricity. This electricity is used to power homes, businesses, and industries in the state.
• Transportation: Rivers are also used for transportation. In Nagaland, there are several rivers that are navigable by boat. This allows people to travel between different parts of the state by boat. It also allows goods to be transported by boat, which is a cheaper and more efficient way to transport goods than by road.

In conclusion, rivers play a crucial role in Nagaland in irrigation, hydropower generation, and transportation.