A water sport activity popular in the coastal areas of Karnataka:

Surfing
Kayaking
Snorkeling
Windsurfing

The correct answer is A) Surfing.

Surfing is a water sport in which a person rides a wave using a surfboard. The rider stands or kneels on the board and uses their hands and arms to paddle the board into position, then uses the wave’s power to propel themselves forward. Surfing is a popular activity in many coastal areas around the world, including the coastal areas of Karnataka.

Kayaking is a water sport in which a person sits in a kayak and uses a paddle to propel the boat forward. Kayaking can be done on calm waters, such as lakes and rivers, or on rough waters, such as the ocean. Kayaking is a popular activity for recreation, fishing, and exploring.

Snorkeling is a water sport in which a person swims with a snorkel, which is a tube that allows them to breathe while they are underwater. Snorkeling is a popular activity for people who want to see the underwater world without having to scuba dive.

Windsurfing is a water sport in which a person rides a board on the water using a sail. Windsurfing is a popular activity for people who want to combine the thrill of surfing with the excitement of sailing.

In conclusion, the correct answer to the question “A water sport activity popular in the coastal areas of Karnataka” is A) Surfing.