Define oxidation in terms of election transfer

Explanation:

Is the loss of electrons, gains of oxygen or loss of hydrogen

Oxidation is the loss of electrons or an increase in the oxidation state of an atom, an ion, or of certain atoms in a molecule. Reduction is the gain of electrons or a decrease in the oxidation state of an atom, an ion, or of certain atoms in a molecule

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

catya that's not even a b or c