is a black hole a star?

No, and no.

A black hole (BH) is formed when any amount of matter gets inside a region of space smaller than its Schwarzschild radius. Usually the matter that did this, was one or more stars. But after the collapse, there is only the black hole. And nothing about it retains any clue to the nature of what went into making it, except its mass, net electric charge, and angular momentum (the "Werner Israel Theorem").

A BH is a region of spacetime whose curvature is so great that there is a spheroidal boundary (the event horizon, EH), inside which the radial direction is time-like, and terminates, in finite time, in a spacetime singularity, where the curvature of spacetime is infinite. Nothing inside the EH can escape the singularity, because nothing can go backward in time.

It isn't the "death of energy," because, mass and energy being equivalent, whatever mass-energy content went into the formation of the BH, remains in some form, as evidenced by the gravitational effects of the BH on all other mass-energy in its vicinity (and beyond, for that matter -- pardon the pun!).

A black hole was a star at one time in its life, but a black hole is no longer a star.

Its not the final death of energy since the energy is still there in the form of gravity.

It's what used to be a star. More specifically, a star that was so big that in its death throes, it collapsed down to become a black hole. What could "the final death of energy" possibly mean?

technically it is a star but it is also not a star. the black hole is the final phase of a star's life the black hole is formed when a star explodedes and collapses on itself, creating a hole of ever lasting blackness that nothing escapes to it is kind-of a star, but not really. and no the energy is not dead it still exists in a way.

Negative sir.. Matter cannot be destroyed. When matter passes through a black hole, would we live, presumably no but we would still exist as matter. Energy is simply and complexly distorted.

As far as death goes, there is scientific research focusing on the study of consciousness. The research tries to answer questions like; "Is there life after death", or "What is life after death".. Basically, the stuff people are trying to figure out now, soon we will know exactly what happens to energy when it gets sucked in a black hole.

A black hole isn't a star it's a stage in the life of a star. It's the final stage in a stars life.

It is not an star but is having the remains of a star.

No, is it's a 'has been a star' and now it's just a singularity.

its pretty much an inside out star