The Paleozoic Era ended with a mass extinction event that was likely caused by Choose one: A. the evolution of land plants. B. the formation of high-latitude ice sheets. C. the formation of Pangaea. D. intense volcanic activity.

D. intense volcanic activity.

Explanation:

The Paleozoic era an era in the geologic time and started about 541 million years. It originated due to the diversity of life forms on the planet.  and ended about 252 mn years ago along with the end of Permian era. The extinction was related to the changes in climate and  exceptionally low sea levels. During which about 95% of the marine species were killed.

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