Answer:
Differential survival indicates that a particular advantageous trait is benefiting a species, allowing the species to survive and produce more offspring. In the case of the Fogg Dam toad, it is evident that they are highly invasive as a species because they have the beneficial traits of long legs and the ability to move both during the day and at night. They also move much faster per day than the established toads in this area. The species passed along these traits to their offspring, giving their babies the ability to run even faster to continue to survive the invasion.
