B. It provides an example of what is stated in the first sentence.
Explanation:
According to the given sentences, it is narrated that grizzly bears have been the target of hunters who killed them for their fur and skulls.
The second sentence states that in the past 100 years, human hungers have reduced the grizzly bear population from 50,000 to 1,000 and this second sentence provides an example of what is stated in the first sentence.
