In the peripheral nervous system, enable us to move, and cause glands to contract and to secrete hormones.

why do you want to cheat? i dont take it, so i dont know.

explanation:

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i think the answer is composed of atoms

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