The main purpose of a particle accelerator is to

Answer;

Speed up small particles

Explanation;A particle accelerator is a machine that accelerates the sub-atomic particles such as electrons or protons to high energies. The particle accelerators produce beams of charged particles which may used for different research purposes. The accelerators propel charged particles to speed near the speed of light and colliding them using electromagnetic fields, which allows scientist to use them in research.

B

Explanation:

it just makes the most sense to me