The option which correctly compares beta decay and gamma decay is Beta-decay releases a particle, while gamma decay only reduces th

e energy of the nucleus. In beta decay, a neutron is converted into a proton, releasing a beta particle (either an electron or a positron) and a neutrino. In gamma decay, excess energy is released from the nucleus in the form of a high-energy gamma photon, without changing the atomic number or mass number of the nucleus.