Answer:
C. The volcanic activity
Explanation:
The Devonian period is the period in which the diversification of life exploded. The fish types increased significantly, while the plants started to develop proper roots and grew much larger. Also, in this period we have the formation of the first soils.
As a period it has been relatively cold, and the main reason for that are the plants because they extracted large amounts of carbon dioxide from the atmosphere. By the end of this period though, large volcanic eruptions occurred, and through them, lot of carbon dioxide was released into the atmosphere, warming up the planet for few degrees and changing the climate.
Answer:
Idk why people are saying volcanic activity that is wrong it is melting of glaciers
Explanation:
At the end of the period the glaciers melted which all the trapped carbon dioxide was released
