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.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

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