From which teams did the origins of Naval Special Warfare (NSW) come?

The origins of Naval Special Warfare (NSW) can be traced back to the Naval Combat Demolition Teams (NCDTs) and Underwater Demolition Teams (UDTs). These teams were established during World War II to perform critical tasks such as demolition of enemy obstacles on beaches and conducting reconnaissance in advance of amphibious assaults. Their unique skills in underwater operations and explosive demolition laid the groundwork for the capabilities that would later evolve into today's NSW units, including the Navy SEALs. The expertise developed by these early teams was integral to the success of various military operations and directly contributed to the establishment of a formalized special warfare community within the Navy. This historical foundation is why this choice is recognized as the correct answer.