The correct answer is a) Titanium dioxide.
Kerala’s black sands are known for their high concentration of titanium dioxide, a mineral that is used in a variety of products, including paint, sunscreen, and cosmetics. Titanium dioxide is also used in the production of ceramics, rubber, and plastics.
Calcium carbonate is a white mineral that is found in limestone, chalk, and marble. It is also used in the production of cement, paper, and glass.
Silica is a hard, brittle mineral that is found in sand, quartz, and flint. It is also used in the production of glass, ceramics, and concrete.
Magnesium ore is a mineral that is used in the production of magnesium metal. Magnesium metal is used in a variety of products, including batteries, aircraft, and construction materials.
In conclusion, Kerala’s black sands are known for their high concentration of titanium dioxide. Titanium dioxide is a mineral that is used in a variety of products, including paint, sunscreen, and cosmetics.