Studies of topsoil erosion on iowa farmland shows that as much as 50 metric tons are lost per hectare during winter and spring rains. this loss is due to the loss of millimeters of soil from across the entire surface of the fields. which type of erosion would this be?

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