The correct answer is a) Titanium dioxide.
Kerala’s black sands are known for their high concentration of titanium dioxide, which is a naturally occurring mineral that is used in a variety of products, including paint, sunscreen, and cosmetics. Titanium dioxide is a white pigment that is also used to make paper whiter and to improve the brightness of plastics. It is also used in toothpaste and other oral care products to help whiten teeth.
Calcium carbonate is a white mineral that is found in limestone, chalk, and marble. It is also the main component of seashells and coral. Calcium carbonate is used in a variety of products, including toothpaste, antacids, and fertilizers.
Silica is a white or colorless mineral that is found in sand, quartz, and flint. It is also the main component of glass. Silica is used in a variety of products, including glass, ceramics, and concrete.
Magnesium ore is a mineral that contains magnesium. Magnesium is a light metal that is used in a variety of products, including batteries, alloys, and fertilizers.
In conclusion, Kerala’s black sands are known for their high concentration of titanium dioxide. Titanium dioxide is a naturally occurring mineral that is used in a variety of products, including paint, sunscreen, and cosmetics.