The water cycle. That is because they both deal with water.
The more extreme winter storms in the Southern United States will result in change of behavior or migration of the animals that live there. The reason for that is that the animals, in this case the birds, will not be able to get to enough food, so they will have to move to a region that will provide enough food for them to survive. These birds are used to mild winters and sufficient amount of food, but the more extreme winter conditions bring in temperatures that are not suitable for the birds, and on top of that the food sources will be damaged. This will force the birds to migrate further south, toward Mexico or Central America where the winter conditions would be much better for the birds and they will be able to sustain their populations.
A snake is a carnivore so it would be C
