Black soils, found in limited areas of Kerala, are known for their:

Cotton cultivation
Rice cultivation
Tea cultivation
Coffee cultivation Answer: a

The correct answer is: a) Cotton cultivation.

Black soils are found in limited areas of Kerala, and are known for their fertility and ability to retain moisture. They are ideal for the cultivation of cotton, which is a water-intensive crop. Cotton is a major cash crop in Kerala, and is grown in the districts of Palakkad, Thrissur, and Malappuram.

The other options are incorrect because:

  • Rice cultivation is not well-suited to black soils, as they are prone to waterlogging.
  • Tea cultivation is not a major crop in Kerala.
  • Coffee cultivation is not well-suited to black soils, as they are not acidic enough.