The Earth's layer with temperatures reaching up to 11,000 degrees Fahrenheit (around 6,093 degrees Celsius) is the inner core.

Here's why:

* Inner Core: This is the Earth's solid, metallic sphere at the very center. The immense pressure from the weight of all the layers above it, combined with heat from the Earth's formation and radioactive decay, keeps the inner core solid despite the extremely high temperatures.

Let me know if you'd like to learn more about the Earth's layers!