Proxima Centauri and the Sun are both main sequence stars, but Proxima Centauri is a red dwarf and the Sun is a yellow dwarf. Based on the information you charted, compare the characteristics of red dwarf stars and yellow dwarf stars.
While yellow dwarf stars have masses comparable to the sun, red dwarf stars have low mass main sequence. Additionally, red dwarf stars are dimmer than yellow dwarf stars because they burn at a lower temperature of 3500 degrees Celsius. The low burning temperature contributes to a lower consumption of hydrogen gas.