Which statement is true according to plate tectonics theory?
a.) the plates that make up the asthenosphere float on top of the denser lithosphere.
b.) the plates that make up the mantle float on top of the denser crust.
c.) the plates that make up the core float on top of the denser asthenosphere.
d.) the plates that make up the lithosphere float on top of the denser asthenosphere.

Water changes bacteria in the soil converts this nutrient into a usable form. plants take up the usable nutrient through the soil and assimilate it into proteins, making it part of the plant. an animal eats the plants, and the nutrient becomes part of the animal. when the animal dies, it decomposes, returning the nutrient back to the soil. which cycle is being described? water cycle carbon cycle nitrogen cycle phosphorous cycle