* Jellyfish: Jellyfish are made mostly of water and have very little hard, durable material. Their soft bodies decompose quickly after death, making fossilization extremely unlikely.

* Fox: Foxes are mammals with bones. While bones can fossilize, the process requires specific conditions like rapid burial and protection from scavengers.

* Moth: Moths have a hard, chitinous exoskeleton that can fossilize under the right conditions.

In summary: Moths have the best chance of leaving fossil remains because of their hard, durable exoskeletons.