is a black hole a star?
is a black hole 4d?
No, a black hole is not a star. It is formed from the remains of a massive star that has collapsed under its own gravity. It is called a "black hole" because its gravitational pull is so strong that nothing, not even light, can escape from it.
Regarding the dimensionality of a black hole, it is described by the three dimensions of space (length, width, and height) like any other object in the universe. However, its extreme gravity can create significant distortions in space and time, leading to the concept of a black hole being a four-dimensional object in the framework of general relativity.