None of the options provided (beta-plus decay, alpha decay, gamma decay, beta-minus decay) represent nuclear fission. Instead, nuclear fission is a process in which a heavy nucleus splits into two or more lighter nuclei, accompanied by the release of energy and neutrons. The types of decay listed are forms of radioactive decay, but they do not involve the splitting of a nucleus like fission does.
If you are looking for the type of decay associated with the fission process, it’s important to note that fission is distinct from radioactive decay; it generally refers to the splitting of heavy isotopes like Uranium-235 or Plutonium-239 when they absorb a neutron.
1 answer