The correct answer is A) Tulu.
Tulu is a Dravidian language spoken by the Tulu people in the Indian state of Karnataka. It is the official language of the Dakshina Kannada district and the Kasaragod district of Kerala. Tulu is also spoken in the Udupi district of Karnataka and the Mangalore district of Kerala.
Tulu is a tonal language with six tones: high, low, rising, falling, rising-falling, and falling-rising. Tulu has a complex system of noun declension and verb conjugation.
Tulu is a rich and vibrant language with a long and rich history. It is the language of the Tulu people, who have a rich culture and heritage. Tulu is a language that is worth learning and preserving.
The other options are incorrect because they are not dialects of Kannada that are primarily spoken in the Dakshina Kannada district.
B) Havyaka is a dialect of Kannada that is spoken by the Havyaka people in the Uttara Kannada district of Karnataka.
C) Mandya Kannada is a dialect of Kannada that is spoken by the people of Mandya district in Karnataka.
D) Konkani is a Indo-Aryan language spoken by the Konkani people in the Indian states of Goa, Karnataka, and Maharashtra. It is also spoken in the Indian state of Kerala and in the countries of Portugal, the United Kingdom, the United States, Canada, Australia, and New Zealand.