Life on Earth changed from consisting of only small, single-celled organisms to including large, multicellular organisms. Thus, option "D" is correct.
<h3>What are fossils traces?</h3>
A fossil expresses the traces or is the remains of a prehistoric plant or animal that has died and its body part has been carefully been imprinted onto the surface of the rock that is sedentary as they have the characteristics of the mineral preserving qualities.
Their age, method of formation and evolutionary significance can be well established by the fossil remain in rocks that depict their occurrence throughout the carbon dating of the rocks.
The process that leads to the formation of fossil is Personalization, casts and moulds, recrystallization and Carbonization. Tracing a fossil consists of digging out the track and burrows.
Some fossil is found in deposits of resins which completely preserve the fossils from the erosion process.
Thus, option "D" is correct.
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