Answer: Based on the models, we would expect rabbits to be the most abundant animal in the forest.
Explanation: According to the theory of predator-prey relationships, when the population of predators increases, the population of prey decreases. Grizzly bears and deer are natural predators to rabbits, squirrels, and sparrows. Since the question does not mention any significant environmental changes, we can assume that the population of predators and prey is relatively stable. Therefore, we can predict that the most abundant animal in the forest would be rabbits, which are at the bottom of the food chain.