Life AS WE UNDERSTAND THE TERM (note the wording) can not exist within a black hole. Our understanding of the term "life" requires the ability of atoms to form chemcial bonds: something that can not happen within a white dwarf, let alone within a neutron star, let alone within a black hole.
Could there be a form a life beyond our present understanding of the term? Yes, but that would mean we would have to re-define the word "life."
According to current theory, a black hole, if it exists, begins its life full,and nothing that falls into it ever leaves it.
No one has ever visited a black hole.
No. When more matter falls into a black hole, it only makes it bigger and gives it even stronger gravity.
There already are black holes.
No, but some stars end their life by becoming a black hole.
Should Earth ever collide with a black hole, it would get destroyed.
Well, since nobody has ever been in a black hole....... what do you think?
No non-fiction person has ever gone into a black hole.
Due to the immense gravity of a black hole, no life we can currently fathom could survive in one.
no
no it does not depend on the black hole in the middle of the galaxy
No.