How do rocks absorb carbon dioxide?

Scientists have long known that rocks naturally absorb carbon dioxide over thousands of years by binding it with minerals to form solids like calcium carbonate, a common substance found in rocks and the main component of snail shells and eggshells.

Explanation:

Known as enhanced rock weathering, the process involves layering crushed rock onto soil. When silicate or carbonate minerals in the dust dissolve in rain water, carbon dioxide is drawn from the atmosphere into the solution to form bicarbonate ions.

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers