The northeast monsoon is crucial for the cultivation of:

Samba rice
Kuruvai rice
Thaladi rice
Summer crops

The correct answer is: a) Samba rice

The northeast monsoon is a seasonal wind that blows from the northeast towards the southwest across the Indian subcontinent from October to December. It is the main source of rainfall for the region, and is crucial for the cultivation of rice.

Samba rice is a type of rice that is grown during the winter season. It is a long-grain rice that is known for its good quality and taste. Samba rice is a staple food in many parts of India, and is also exported to other countries.

The northeast monsoon is important for the cultivation of samba rice because it provides the necessary rainfall for the crop to grow. The monsoon rains also help to replenish the groundwater, which is used for irrigation.

The other options are incorrect because they are not rice crops that are grown during the winter season. Kuruvai rice is a type of rice that is grown during the summer season, while thaladi rice is a type of rice that is grown during the rainy season. Summer crops are crops that are grown during the summer season, which is from March to June.