Question

examine the image here. hint: use the slides to get a better view. which organism appeared last? crinoid trilobite ammonite fern gastropod

Explanation:

Crinoids first appeared in the Ordovician period. Trilobites emerged in the Cambrian. Ammonites appeared in the Devonian and became extinct in the Cretaceous - Paleogene extinction event. Ferns have a long history dating back to the Devonian. Gastropods first appeared in the Cambrian. Ammonites had a relatively later - appearing and longer - lasting existence among these compared to the others in terms of geological time scale.

Answer:

C. Ammonite