What name is given to the process by which an organising develops from a single cell into many kinds of cells

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

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