What is not a drawback of using fossil fuels ( apex )

Which of the following is a cost of urbanization? a-cities can provide a high standard of living. b-cities are hubs of entertainment and education. c-paving over land changes the environment. d-job opportunities are greater in urban centers.

Environmental differences within ecosystems are generally caused by

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?