Final answer:
The cause-and-effect structure in a black hole is caused by the star's center collapsing due to the end of its nuclear fuel. This creates intense gravitational forces and leads to the formation of a black hole.
Step-by-step explanation:
The subject of this question is Physics. The question is asking about the cause-and-effect structure in a black hole. In the given options, it states that the star's center collapsing causes the end of the star. This collapsing creates intense gravitational forces, leading to the formation of a black hole.
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