What produces the heat in the centre of the earth?

The core produces heat in the center of the earth

There are three main sources of heat in the deep earth: 1, heat from when the planet formed and accreted, which has not yet been lost. 2 frictional heating, caused by denser core material sinking to the center of the planet, and 3:heat from the decay of radioactive elements.

Explanation:

There are three main sources of heat in the deep earth: 1, heat from when the planet formed and accreted, which has not yet been lost. 2 frictional heating, caused by denser core material sinking to the center of the planet, and 3:heat from the decay of radioactive elements.