A cyclic process is occurring in C3-plants

A cyclic process is occurring in C3-plants, which is light-dependent and needs ${{CO}_{2}}$. This process
does not produce, but consumes energy.
(i) Can you name the given process?
(ii) Is it essential for survival?

(i) Photorespiration.
(ii) Yes, because by consuming oxygen at higher temperature, it protects the chlorophyll from photooxidation.