Which of the following statements is true about oxidation?

The correct choice focuses on the principle that oxidation involves the loss of electrons. In the context of chemical reactions, oxidation is defined as the process where an atom, ion, or molecule loses electrons. This loss of electrons corresponds to an increase in the oxidation state of the substance undergoing oxidation.

When an atom is oxidized, it often results in a more positive charge because the removal of negatively charged electrons leads to a higher positive charge overall. This concept is fundamental in redox (reduction-oxidation) reactions, where oxidation and reduction occur simultaneously; as one species loses electrons (oxidation), another gains them (reduction).

Understanding this definition is crucial in the study of chemistry, as oxidation reactions play a central role in various processes, including combustion, respiration, and corrosion.