Fact 1: Population size influences the chances of a species surviving. Fact 2: Economic migration affects the population size. Given the two facts above, what influences the chances of a species surviving?

Pick your answer from:
[A]. light energy
[B]. migration
[C]. plate tectonics
[D]. cell division
[E]. animals
[F]. temperature
[G]. environment
[H]. erosion
The answer is:
[B].