The correct answer is: a) Below sea-level rice cultivation.
Kuttanad is a region in the Indian state of Kerala. It is known for its unique below sea-level rice cultivation. The region is located in a vast wetland area, which is home to a number of rivers and canals. The water from these rivers and canals is used to irrigate the rice fields. The rice fields are located on raised platforms, which are built above the water level. This allows the rice to grow even though the land is below sea level.
The below sea-level rice cultivation in Kuttanad is a unique and sustainable agricultural practice. It is a testament to the ingenuity and resilience of the people of Kuttanad.
The other options are incorrect because:
- Option b) Spice cultivation is not unique to Kuttanad. Spices are grown in many parts of India.
- Option c) Pineapple cultivation is not unique to Kuttanad. Pineapples are grown in many parts of the world.
- Option d) Terrace cultivation is not unique to Kuttanad. Terraces are used for agriculture in many parts of the world.