Pretty much the same way as any other comparable mammal would do. Cats, dogs, pigs, horses etc, they all go about it the same way.
Sumatran tigers reproduce to keep the species alive.
Tigers reproduce sexually.
yes they reproduce by having babies
The asiatic black bear's main enemy are humans. Tigers do prey on asiatic black bears, but it happens on rare occasions.
they have sex
Yes, they do.
Not really. Tigers are the predators that a person has to worry about more than an asiatic black bear.
By mating tigers have babies to reproduce and keep their species alive
internally
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.
No. There are more lions than tigers. There are 2 known major subspecies of both lions and tigers. Lions - The African Lion & The Asiatic Lion Tigers - The Bengal Tiger & The Siberian Tiger There are around 600 odd Asiatic lions left in the wild. There are around 1200 Bengal tigers left in the wild. Siberian tigers too range around 1000 individuals. The African lion is the most populous of the 4 species. Thousands of them are alive in Africa
White tigers, like other tigers, reproduce sexually through mating between a male and a female tiger. After mating, the female will give birth to a litter of cubs.