Answer: huskies are strong and powerful animals.
Step-by-step explanation:
The excerpt best supports a central idea in the passage by showing that huskies are strong and powerful animals. This can be seen as it was written that the dog threw his whole weight upon the traces and drove his claws into the frozen trail, calling every muscle into play. This shows the strength possessed by the animal.
Other options are wrong as they didn't show how strong the dog was.