This is the only option that contains an unnecessary and biased opinion. By phrasing the headline in this way, the author gives the grizzly bear a negative intention, while framing the attacked people as "innocent." This encourages a negative view of the bear which is unlikely to be accurate. Therefore, this is the best example of an opinion, as the author is letting his personal views affect the way he tells the news.
It means he was happy and felt good in his heart. You know when you see or do something like buy your mom a gift she loves and your heart seems to feel like it is filled with happiness? That's the feeling that I believe William Wordsworth is trying to express.
