A tiger is a meat eater, a carnivore, and therefore its entire body is made for hunting; getting its food. The most obvious would be its claws and teeth. You can think of them as meat hooks attached to a deli-meat slicing machine that has as much power as a motorcycle.
for skin
there paws
their paws
cheeseburgers!
Maybe, possibly, if the zoo also has a zebras, and one of them dies.
they use it to build body parts and make cells
your body digests food which turns it in to energy that goes through your bloodstream to all parts of your body
, beak ...
mouth or gills
Its balls
the ears
Surviving to reproduce itself. To make more white tigers.