Final answer:
The introduction of a faster-running rabbit to the original rabbit population would lead to a decrease in the number of slower rabbits.
Step-by-step explanation:
When a faster-running rabbit is introduced to the original rabbit population, it would have a competitive advantage over the slower rabbits in escaping from predators. As a result, the faster rabbits would have a higher chance of survival and reproduction, while the slower rabbits would be at a disadvantage. Over time, this could lead to a decrease in the number of slower rabbits in the population.