Respuesta :
Scientists studied Fossils to develop the geologic time scale.
Precambrian is the division of the geologic time scale includes most of Earth’s history.
What is Fossil?
This is defined as the remnant of an animal or plant of a past geologic age that has been preserved in Earth's crust.
The study of fossils is referred to as Paleontology and Precambrian contains most of Earth’s history..
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