Ferrum is the Latin name for ________.

 iron

The correct answer is option 3. iron.

The Latin name for iron is ferrum. So the answer is iron.

Iron (Fe) is a chemical element widely used in various applications due to its unique properties like strength, malleability, and ductility.

Ferrum has been the historical name for iron for centuries, and it's still occasionally used in some contexts, particularly in the medical field.

The other options (nickel, copper, and zinc) have different Latin names:

Nickel (Ni): Niccolum

Copper (Cu): Cuprum

Zinc (Zn): Zincum