How we suppose to know Read the book
B (the romans) is the correct answer...
It would be harder for us to identify all the different types of animals that lived long ago.
Erosion of farmland, overuse of both surface and groundwater, dwindling supplies of finite fossil fuels, and escalating extinction of plant and animal species imperil the ability of the earth's resources to meet the needs of such enormous numbers of humans. The food situation worldwide is becoming critical
