Which of the following is an example of industrial transformation? High-speed rail Electric vehicles Lead-free fuel None of the above

All three options - High-speed rail, Electric vehicles, and Lead-free fuel - can be considered examples of industrial transformation.

1. High-speed rail: This represents a transformation in the transportation industry. High-speed rail systems allow for faster, more efficient travel, reducing reliance on cars and airplanes, which can have a significant environmental impact.

2. Electric vehicles: The rise of electric vehicles represents a significant transformation in the automotive industry. Electric vehicles are more energy-efficient and environmentally friendly than traditional gasoline-powered cars, leading to a shift in how vehicles are produced and used.

3. Lead-free fuel: The development and use of lead-free fuel represents a transformation in the energy industry. Lead was once commonly used in gasoline, but it has been phased out due to health and environmental concerns. This has led to changes in how fuel is produced and what types of fuel are used.

So, the answer is not "None of the above". Instead, all three options are examples of industrial transformation.