What are some of the primary influences in the development of a large city?

As a small change in a person's dna can cause a genetic disorder

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

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