Well, perhaps there are stories about the honey bear's search for food. It might be shown looking for honey in beehives. And for other animals, there could be tales of how they interact with the honey bear, like small animals trying to avoid it as it's a big predator for them.
Sure. There could be a story where a honey bear befriends a squirrel. The squirrel is initially scared of the honey bear but realizes that the honey bear is not interested in harming it. Instead, the honey bear helps the squirrel find a new tree to live in when its old one is destroyed. This shows an unexpected friendship between two very different animals.
The bear might be crying in the manga because of a conflict with other animals or a sad event in its life. Sometimes, the author uses such emotions to add depth to the story.
The idea of a forest flowing with milk and honey in manga could symbolize a place of extreme prosperity and fulfillment. It might be used to convey a sense of wish fulfillment or a utopian vision. Different mangas might interpret it in various ways based on their themes and genres.
Definitely not. Polar bears have no way of knowing or caring about manga. They have their own instincts and behaviors related to their survival and existence in the wild, which have nothing to do with fictional stories in manga.