Respuesta :
Answer: High temperature and pressure.
The inner core is hotter than the outer core. The temperature and pressure inside the core is much more. The pressure on the inner core is much more than the outer core .The inner core is made up of iron and due to high pressure the melting point of iron rises and it is found in solid state. However, the effect of high pressure subsides the effect of high temperature as a result, the inner core is solid in nature.
