How was gravity a major source of heat in the early days of Earth and what does it contribute today?

Gravity a major source of heat in the early days of Earth and it contribute today is explained below in complete detail.

Explanation:

Gravity within such a tremendous material compresses the body in its center so stimulating that the tension swells. As Earth's interior pressure increased, its temperature also increased. Radioactive consumption: Radioactive consumption discharges heat, and pioneer in the planet's archives there were many radioactive particles with short half-lives.

using the scientific method.