Which layer of the Earth’s internal structure is primarily composed of solid iron and nickel, despite having temperatures hotter than the surface of the sun due to immense confining pressure?

💡 Explanation:

The Inner Core is the Earth's densest and hottest layer, made mostly of solid iron and nickel. Although its temperature is extremely high (estimated to be over 5,000 °C), the extreme pressure exerted by the overlying layers prevents the iron and nickel from melting, keeping it solid.