Afossil mold that reflects the shape and surface markings of an organism is created when

a. pressure squeezes out liquids and gases, leaving a thin film of carbon
b. permafrost preserves the organism in its intact form or with slight changes
c. the hollow spaces in the organism are later filled with mineral matter
d. the organism is buried in sediment and then dissolved by underground water

The best and most correct answer among the choices provided by the question is the second choice "permafrost preserves the organism in its intact form or with slight changes"

The difference between a mold fossil and a cast fossil is that mold fossil is formed when an object is placed into soft mud and is removed by decomposition or physical sources; a castfossil happens when a mold fossil fills up with sediment.

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