The correct answer is c because I just know it
The ends of the geologic eras such as the Paleozoic and Mesozoic are marked by "climate changes" since these changes brought about devastating effects on the climate, which was crucial for the survival of many animals and plant life.
Social, economic, and political reforms.
hope that this helps you. =)
We had discovered coal in the appalchian mountain. we also had the development of railroads.
