Question

A black hole is a star that has

begun to collapse in on itself
too little gravity to emit light
gotten to the middle of its life
become too bright to see

Answer 1

A black hole is not a start that has BEGUN to collapse, it is a start atleast bigger than a red giant that HAS collapsed after going super nova, the gravity around a black hole is far more than most stars making is so light waves can not escape the gravity.