What is the name of the processes in which reductants and oxidants are involved?

Oxidants are involved in the recovery process. Reduction is the process of attaching electrons to an atom of a substance, while its oxidation state decreases.
Reducing agents are involved in the oxidation process. Oxidation is the process of donating electrons with an increase in the oxidation state.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.