Hi there!
We know that most wolves tend to live in colder habitats, and are carnivores. They also tend to be top predators, meaning they are less protection focused (from other animals) and are more hunting focused.
Based off all this information, we can eliminate some choices:
a is just incorrect, because fur does not help wolves help in any way, and sharp teeth also do not help wolves in cold winters.
b is also incorrect, because teeth do not help the wolves blend in.
c is incorrect, because as we've already seen, they don't need much protection from predators (though that is possible).
d is correct, because we've also seen they do tend to live in colder climates, making it realistic for the fur to be protecting them from the winters. We've also seen they are predators and carnivores, meaning that it is also realistic to say the sharp teeth help them hunt.
Thus, your answer is d, the thick fur protects them in cold winters, and the sharp teeth help them hunt for food.
Hope this helps! Feel free to let me know if you have any questions for this specific problem.
