No
Whales are the largest mammal on Earth. ^ So, yes.
Some small whales are called dolphins, but small whales are still whales.
Some do. For example, dolphins and whales are marine mammals and they have fins.
Some piranha are alive. They are still a species in existence
Only some Holocaust Survivors are still alive.
Not all mammals have four legs. Bats are mammals, but have only two "legs." Whales and dolphins are mammals, but have no legs at all. What distinguishes mammals from other animals is not the number of legs, but the presence of sweat and milk glands.
some are
No
I believe Dee Henderson is still alive. some of her books came out in 2003. so i am pretty sure she is still alive.
Extinct means all gone, no one left alive. And xince we still have whales, thay aren't extinct. But they are threatened, not many left. A bit more hunting, maybe some disease, could easily kill off all that are left.
Some Chris Walkers that have lived on Earth will have died, others will still be alive.
Yes, there are some of the successors of Mughals who are still alive.