Final answer:
In a battery, the substance that is oxidized depends on the type of battery being used.
Step-by-step explanation:
In a battery, the substance that is oxidized during the discharge process depends on the type of battery.
In a Nickel-Cadmium (NiCad) battery, the anode (negative electrode) is made of cadmium, which is oxidized during the discharge process.
In a lead storage battery, the anode is made of spongy lead metal, which is oxidized during the discharge process.