3. Carbon, nitrogen, and phosphorus are cycled in the ecosphere. Why do farmers not need to apply carbon
grow their crops, but often need to supply fertilizer
containing nitrogen and phosphorus?

wegner's theory did not explain how the continents could move

explanation:

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

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