The processes which produce heat that contributed to the formation of Earth's different layers include the collision of materials, compaction of materials, and radioactive activity.
- There are three different layers that make up the Earth which are the mantle, the crust and the core. They are made of solid rock which is usually granite and basalt.
- The radioactive decay of the elements that are in the Earth's crust releases heat energy. It should be noted that about fifty percent of the internal heat that comes from the Earth is through radioactive decay.
In conclusion, the correct options are A, B and D.
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