It seems like you're trying to match images to the corresponding fossil types: Cast, Mold, and Trace. While I can't see the images, I can explain how to identify each fossil type, which might help you with your task.
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Cast: A cast fossil forms when a mold fossil (the imprint of the organism) is filled in with mineral deposits, producing a replica of the original organism. Look for three-dimensional structures that appear to be filled in.
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Mold: A mold fossil is created when an organism leaves an impression in sediment that hardens. Molds are typically two-dimensional and will show the external shape of the organism but do not contain the original material.
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Trace: Trace fossils indicate the activity of organisms rather than their physical remains. These can include footprints, burrows, or even fossilized droppings (coprolites). Look for signs of movement or behavior rather than remains of the organism itself.
If you can describe the images or provide other context, I may be able to guide you more specifically. Otherwise, match the images based on the definitions provided above. Good luck!