What are traces of living things that are preserved in rock called?
a.
oxygen
c.
sediments
b.
fossils
d.
dinosaurs

The correct answer is B. Traces of living things that are preserved in rock are called fossils.

Explanation:

A fossil is the set of remains of an organism that lived in the past or a trace of its activities that has been preserved in sedimentary rocks as a result of a physicochemical process. These remains may have undergone more or less intense changes in their composition (by diagenesis) or deformations (by dynamic metamorphism). Paleontology is the science that studies the origins and development of life through fossils.

The most famous fossils are the remains of animal skeletons and shells, as well as the carbonaceous impressions of plants. However, fossil remains are not only those that come from the petrified hard parts of these organisms; molds, bioconstructions, or traces of their activity that have been left on different sedimentary or organic substrates are also considered fossils. In an extreme case, oil, a fluid composed of organic hydrocarbons, must be considered both a sedimentary rock and a chemical fossil.

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