Lions and tigers both come from cats more than bears do. Bears are more like dogs in a way. If you look quite far back at their ancestors, it will be quite clear how both the lion and tiger have lots of the same ancestors.
brown bears
tigers and polar bears
Asiatic black bears, and even sloth bears and sun bears. Tigers sometimes will prey on these species. None are a threat to a tiger at all.
Depends on what species of "black" bear you're referring to.
it is lions, tigers, and bears
Depends on the age, and sex of either species. Bengal tigers are stronger hunters, while male sloth bears are more defensive in territories. So it's possible they could be similar as far as strength is concerned.
Siberian tigers prey on various deer species, wild hog, even brown bears on occasion.
Humans are the most formidable enemy of bears. Other enemies depend on the species. For brown and black bears, they include wolves and other bears. For sloth bears, they include tigers and leopards.
There are bears in Turkey but no tigers..
Sloth bears are prey to bengal tigers, but happens on occasion.
Tigers do. Tigers predate on bears in India and Siberia.
Yes, black bears can swim. Their ability to swim is similar to other bear species, as most bears are capable swimmers.