The correct answer is: a) Iron Ore.
Iron ore is a mineral that is used to make steel. It is the main ingredient in steel, and it is also used in other products such as iron and steel alloys, pig iron, and ferroalloys. Iron ore is found in rocks and minerals, and it is mined in open-pit and underground mines.
Tamil Nadu has deposits of iron ore, and it is one of the major producers of iron ore in India. The iron ore deposits in Tamil Nadu are located in the districts of Madurai, Ramanathapuram, and Tirunelveli. The iron ore in Tamil Nadu is of high quality, and it is used to make steel in the state and in other parts of India.
Manganese is a mineral that is used in the manufacturing of steel. It is a metal that is used to strengthen steel, and it is also used in other products such as batteries, dry cells, and alloys. Manganese is found in rocks and minerals, and it is mined in open-pit and underground mines.
Copper is a metal that is used in a variety of products, including electrical wiring, plumbing, and coins. It is also used in the manufacturing of steel. Copper is found in rocks and minerals, and it is mined in open-pit and underground mines.
Zinc is a metal that is used in a variety of products, including batteries, cosmetics, and roofing. It is also used in the manufacturing of steel. Zinc is found in rocks and minerals, and it is mined in open-pit and underground mines.