Answer:
Controlling the predator population, wolves.
Explanation:
The method followed for the little smoky herd protection was to control their habitat and the population of the predators in the said habitat, which were wolves.
If I recommend the same method as the best way to protect the selkirk caribou, then i would be suggesting controlling the population of the predators in the area, which are mostly wolves, and in this way protecting the population of the selkirk caribou.
I hope this answer helps.