Answer: A. Minerals soak into and completely replace an organism's remains is the correct answer for how petrified fossils form.
Petrified fossils form when minerals gradually replace the organic matter of an organism's remains over a long period of time. This process is known as permineralization. As the minerals replace the original material, they preserve the structure of the organism's tissues, creating a detailed record of its morphology. The resulting fossil is essentially a mineral replica of the original organism with its internal and external features preserved in remarkable detail.
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