AP BIOLOGY

Detailed explanation-1: -The correct option is D. Oxidation. Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion.

Detailed explanation-2: -Oxidation can be defined as the gain of oxygen, the loss of hydrogen, or the loss (or partial loss) of electrons. Reduction, the opposite chemical reaction of oxidation, occurs when oxygen is removed from a compound.

Detailed explanation-3: -Oxidation is the loss of electrons, gain of oxygen or loss of hydrogen. Reduction is the gain of electrons, loss of oxygen or gain of hydrogen.

Detailed explanation-4: -Oxidation and reduction reactions involve the transfer of electrons from one atom to another – one atom losing electrons and another atom gaining electrons. This type of reaction is often called a “redox” reaction (short for reduction/oxidation) as a reminder that both processes are going on at the same time.