The unwritten portion of the question being "...from humans." One cannot rightly do this, unless killing all capitalists has become an option! Don't worry, nature has a way of dealing with that; unfortunately not a pleasant way, for us.
because all the ice is melting and the animals and sea creatures are dying
Yes.
The implementation of laws that slow global warming and in other ways limit the damage of climate change are all works that countries can perform to protect Antarctica.
they signed the treaty and they can do whatever the want with it.
put a plastic container around the plants
Penguins protect themselves: there's not much a continent can do in this regard, except provide beaches upon which penguins can breed.
First, no animal lives in Antarctica. Sea birds and sea mammals breed on Antarctica's beaches, and their natural camouflage of dark backs and lighter underbellies protect them from sea predators.
nucular activity is prohibited including waste disposal
Stop dumping rubbish where ever people feel like it
It is melting and ocean levels are rising. It can’t be replaced once gone.
The study of Antarctica is useful tous because the more we know about antarctica, the better we can protect it. We can also look for new species of plants and animals
No. There is no food chain for bats in Antarctica, and it's too cold for these animals.
To refrain world powers from spoiling the 100% lakes below Antarctica's ice and to stop them from mining the on and below Antarctica's land surface. In short: Refrain world powers from mining the **** out of it.