Answer:
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.
Positive becaus Mexico city is right
One is sports teams, two is tariffs, three is Mexico, four is imports, and five is Great Lakes.
Answer:
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C! water vapor freezes into crystals
