To solve this problem, we need to understand the decay process of tritium.$\\$Tritium is a radioactive isotope of hydrogen, denoted as $^3_1$H$. \\$It undergoes beta decay, which involves the emission of a beta particle.$\\$In beta decay, a neutron in the nucleus is transformed into a proton,$\\$and a beta particle ($\beta^-$) and an antineutrino are emitted.$\\$The nuclear reaction for the beta decay of tritium is:$\\ ^3_1$H$\rightarrow ^3_2$He$+ \beta^- + \bar{\nu}_e \\$Here, $^3_1$H$$ (tritium) decays into $^3_2$He$$ (helium-3),$\\$emitting a beta particle ($\beta^-$) and an antineutrino ($\bar{\nu}_e$).$\\$Therefore, the correct answer is that tritium emits a beta particle ($\beta^-$).$\\$This corresponds to Option 1.