Brown bears had one of the largest ranges encompassing half of North America, almost all of Eurasia, and even reaching into parts of North Africa. They are the 2nd largest bear and despite their name they aren't all brown. There's the Spirit bear which is white like a polar bear (shoutout to Touching Spirit Bear that book was kinda fun to read).
The most notable feature of a Brown bear is their hump on their back. It's muscle and it's believed to have evolved to make it easier for them to dig while foraging. They've evolved in a lot of different climates which they've lived in and these varied climates has lead to a lot of adaptations. Some of my favorite subspecies come from North America and it's a classic bear; Grizzly bears are an inland subspecies of Brown bear. North American coastal Brown bears eat a lot of fish like salmon, but their inland cousins the Grizzly bears scavange even more living off of roots, berries, grub and occasionally animals. Due to their diet's coastal bears are larger then inland bears. Gobi Bears are another species they come from the Gobi Desert in Asia. The desert is not a good place for a bear and they've adapted shorter and blunter claws so they can forage in the rocky sand desert.
I would put the Brown bear at 3rd place I love them and they get me. One of my favorite bears they're adorable and look so silly. Classic pick of a bear; the variety is so cool and they're one my favorite bears.