Identify the labeled structures.
A:
B:
B
C:
А
D:
E:
D

where ??? i only see isn letter A-D

b is the answer and if you need further with anything message me

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