Question

which is the first step in the process during the formation of molded fossils?
sediment hardens into rock.
sediment is eroded from rock.
organisms are buried under sediment.
organisms shapes are preserved in rock.

Explanation:

Molded fossils form when an organism is first buried under sediment. This burial is the initial step. Over time, the sediment hardens. If the organism decays, it leaves an impression (mold). The other options like sediment hardening into rock or organisms' shapes being preserved come after the burial. Sediment being eroded from rock is not the first step in fossil formation. So the first step is organisms being buried under sediment.

Answer:

Organisms are buried under sediment.