What is the primary function of RFID technology?

The primary function of RFID (Radio-Frequency Identification) technology is identification and tracking of objects. RFID uses electromagnetic fields to automatically identify and track tags attached to objects. Each tag contains a microchip with a unique identifier and can be read from a distance by an RFID reader. This technology is widely used in various applications such as inventory management, asset tracking, supply chain operations, and access control, allowing for efficient monitoring and management of physical items without the need for direct line-of-sight, unlike traditional barcodes.

The other choices do not accurately represent the primary function of RFID technology. While it can contribute to secure communication and involves data storage in certain applications (like smart cards), its fundamental purpose revolves around the automatic identification and tracking of items. Wireless audio transmission, while a function of some technologies, is not related to RFID's core use.