Which of the following is a traditional Australian Aboriginal musical instrument?

The Didgeridoo is a traditional Australian Aboriginal musical instrument, known for its distinctive sound and cultural significance. It is typically made from eucalyptus wood that has been hollowed out by termites, allowing for the creation of a long, cylindrical instrument. The Didgeridoo is played by vibrating the lips and using circular breathing, a technique that allows the player to produce a continuous sound. This instrument has been used by Indigenous Australians for thousands of years in ceremonies, storytelling, and social gatherings, making it not only a musical tool but also a vital part of Aboriginal culture and identity.

Other instruments listed, such as the Erhu, Yangqin, and Dizi, belong to different cultural backgrounds. The Erhu is a two-stringed instrument from China, the Yangqin is a hammered dulcimer also associated with Chinese music, and the Dizi is a Chinese bamboo flute. Each is integral to their respective musical traditions but does not have any connection to Aboriginal Australian music. This distinction highlights the significance of the Didgeridoo as a symbol of Australia's Indigenous musical heritage.