the diagram shows a shell fossil. which type of fossil is shown? mold cast trace imprint

Brief Explanations:

• A mold fossil is an impression left by an organism. A cast fossil forms when minerals fill a mold. A trace fossil shows evidence of an organism's activity (e.g., footprints). An imprint fossil is a two - dimensional mark of an organism.
• The shell fossil in the diagram is a three - dimensional replica, which is characteristic of a cast fossil. When the original shell (organism) decayed, the space (mold) was filled with minerals, creating a cast.

Answer:

cast