Answer: The correct answer is option C: "Man-made lagoons and beaches can provide a place for people to surf even without an ocean nearby."
Explanation: The central idea of this passage is that man-made lagoons and beaches, specifically the world's first public artificial wave pool in Wales, provide a place for people to surf even if they live nowhere near the ocean. The passage mentions that this pool was built using rainwater from a nearby reservoir and is able to produce a 6ft-tall barrel of water that peels for 490 feet and runs for 16 seconds.