Why if you made Op-Amp amplifier with closed loop it will be more immunity against temperature?

use op-amp amplifier with open loop because the main op-amp has a switched capacitor common mode feedback circuit. two fully differential folded-cascode op amps with continuous-time CMFBs are used as auxiliary op amps to increase the open-loop gain of the main op amp. Common mode feedback (CMFB) is used to stable the designed op-amp against temperature.