The correct answer is (c) Copper. Malachite is a green mineral that is a copper carbonate hydroxide. It is a secondary mineral that forms from the oxidation of copper ores. Malachite is often found in association with other copper minerals, such as azurite and chrysocolla. It is a popular gemstone and is used in jewelry and other decorative objects.
Iron is a metal that is found in the Earth’s crust. It is the most common element in the Earth’s crust after oxygen. Iron is used in a variety of products, including steel, iron ore, and iron oxide.
Calcium is a mineral that is found in the Earth’s crust. It is the fifth most abundant element in the Earth’s crust after oxygen, silicon, aluminum, iron, and magnesium. Calcium is used in a variety of products, including limestone, gypsum, and calcium carbonate.
Magnesium is a mineral that is found in the Earth’s crust. It is the eighth most abundant element in the Earth’s crust after oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and titanium. Magnesium is used in a variety of products, including magnesium oxide, magnesium carbonate, and magnesium sulfate.