why is still water an ideal environment for the formation of mold and cast fossils?\nsediment builds up over…

why is still water an ideal environment for the formation of mold and cast fossils?\nsediment builds up over organisms.\nhard tissue decays under sediment.\nsoft tissue is preserved under sediment.
Answer
Brief Explanations:
Mold and cast fossils form when sediment builds up over organisms in still - water. This sediment buries and preserves the shape.
Answer:
Sediment builds up over organisms.