Redox reactions involve the transfer of electrons between two reactants. In such reactions, one reactant will undergo oxidation (loss of electrons) while the other reactant will undergo reduction (gain of electrons). The process of reduction involves the gain of electrons by a reactant.

Explanation:

Redox reactions involve the transfer of one or more electrons between two reactants. In such reactions, one reactant will undergo oxidation (loss of electrons) while the other reactant will undergo reduction (gain of electrons). The reactant that gains electrons is said to be reduced, while the reactant that loses electrons is said to be oxidized.

The process of reduction involves the gain of electrons by a reactant. This can occur through a variety of mechanisms, such as:

- The reactant accepts electrons from another molecule or ion.
- The reactant gains electrons through the transfer of a hydrogen ion (H+), which carries one electron.
- The reactant gains electrons through the transfer of a hydride ion (H-), which carries two electrons.

Reduction is an important process in many biological and chemical systems. For example, in photosynthesis, plants use energy from sunlight to reduce carbon dioxide to glucose, a process that involves the gain of electrons by carbon dioxide. In cellular respiration, the opposite process occurs, with glucose being oxidized to produce carbon dioxide and energy.

In summary, the process of reduction involves the gain of electrons by a reactant, which can occur through a variety of mechanisms.