Final answer:
The Electron Beam Research Facility is a particle accelerator used for medical research, particularly in treatments like External Beam Therapy for cancer.
Step-by-step explanation:
The correct answer is a) The Electron Beam Research Facility is a particle accelerator used for medical research. These facilities use high-energy beams of electrons and other subatomic particles to probe the structure of materials, investigate the properties of particles, and in the case of medical applications, treat certain forms of cancer through External Beam Therapy (EBT). In EBT, carefully directed beams of radiation target and destroy cancer cells while sparing the surrounding healthy tissue. Particle accelerators such as the Large Hadron Collider at CERN are also used for fundamental research in physics to discover the laws underlying all matter.