Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[Q]: Question: Alpha particles, beta particles, and gamma particles are major types of what? Answer: radioactivity
[A]: The major types of radioactivity include alpha particles, beta particles, and gamma rays.

[Q]: Question: Which type of cell division halves the number of chromosomes? Answer: meiosis
[A]: Meiosis is a type of cell division that halves the number of chromosomes.

[Q]: Question: How can nuclear fusion in stars be simulated? Answer: particle accelerators
[A]:
Particle accelerators simulate nuclear fusion in stars.