Nêu một số ví dụ về khả năng tự điều chỉnh của cơ thể người.

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

honestly, i believe it's a.true.

do i get brainliest? ?

am i right? ?

answer/// wohler;