Question

in rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. what can be determined from this information?
trilobites existed before jellyfish and ammonites.
jellyfish existed before trilobites and ammonites.
ammonites existed before trilobites and jellyfish.
jellyfish, trilobites, and ammonites lived together.

Explanation:

In geology, the principle of superposition states that in undisturbed rock layers, deeper (lower) fossils are older than fossils found in higher layers. Here, jellyfish fossils are the lowest, meaning they are the oldest, followed by trilobites, then ammonites as the youngest.

Answer:

Jellyfish existed before trilobites and ammonites.