The dominance of China in the hi-tech industry is largely supported by its significant control over the extraction and production of rare earth elements. These elements are vital for the manufacturing of a wide range of high-tech products, including electronics, renewable energy technologies, and advanced defense systems.
Among the options provided, the correct answer is: rare earth elements.
China holds a substantial share of the global supply of these resources, allowing it to play a critical role in the supply chains for various hi-tech industries.