Respuesta :
Life-forms that existed during the Paleozoic era included fish, reptiles and trilobites.
What is Paleozoic era?
- "The Paleozoic Era is the earliest of three geologic eras of the Phanerozoic Eon (538.8 to 251.902 million years ago)."
- It means ancient life as it contains life forms that are extinct in today world.
- The periods included in this era are: Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.
- Many amphibians, reptiles, fish, sponges and trilobites have existed during this era.
- Evolution also occurs at this era which result in new life forms.
Hence, the correct option is d. all of the above.
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