Which best describes an oxidizing agent?
a) a reactant that undergoes oxidation
b) a reactant that undergoes reduction
c) the product of an oxidation
d) the product of a reduction

B) a reactant that undergoes reduction

Explanation:

Oxidation reaction is defined as the reaction in which a substance looses electrons. The oxidation state of the substance increases during oxidation.

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced during reduction.

Overall reaction:

The substance M which itself gets oxidized, reduces other and is called as reducing agent. The substance N which itself gets reduced, oxidizes other and is called as oxidizing agent.

the energy to form plasma comes from heat or electricity in the atmosphere!

sunny~ ☺