Which of these parts of an
animal would be most likely to
form a fossil?
a heart
b kidney
c eye
d tooth

Fossils are made by the imprints of hard materials that do not decompose quickly. Organs would not be found in fossils as they begin decomposing very shortly after the animal's death, way before a fossil will begin to form. However, the teeth, along with the bones, would remain, and be found in fossils. 

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