The water cycle occurs almost exclusively in which layer of our atmosphere?

Earth's water continuously moves through the atmosphere, into and out of the oceans, ... rivers, streams) provides nearly 90% of the moisture in our atmosphere. ... Even the wettest regions would form a layer of water only 60 ...

Explanation:

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

answerall of the above;