Final answer:
The hybrid zone between grizzly and polar bears is likely to change or remain the same in response to environmental factors, notably climate change which influences habitat availability and species interaction.
D is correct
Step-by-step explanation:
The migration of hybrid zones such as those between grizzly and polar bears can be influenced by various environmental factors. In the context of the question, the most likely prediction for the migration of their hybrid zone over time, given the information provided, is that it will change or remain the same in response to the environmental factors that contribute to the well-being of grizzly and polar bears.
The climate change is affecting both species' habitats, with grizzly bears moving farther north and overlapping with polar bear habitats. This overlap has resulted in the creation of grizzly-polar bear hybrids, known as grolar bears. As climate change continues to impact these regions, particularly with the decline in sea ice, the migration and interaction zones of these two species will likely keep shifting in the north. It's important to note that this is a complex issue and the exact outcome will depend on multiple factors, including the rate of climate change, availability of suitable habitat, and the behavior and ecological needs of both species.