This nutrient is cycled between living things and the soil. Plants absorb this nutrient from the soil and turn it into organic compounds through assimilation. Animals eats the plants and pass the nutrient through the food chain from one organism to another. When the animal dies, it decomposes and returns the nutrient back to the soil. The nutrient can also enter the soil through weathering and erosion.
The phosphorus cycle moves phosphorus from soil into plants, then through animals that eat the plants. When organisms die, decomposition returns phosphorus to the soil. Weathering and erosion also release phosphorus from rocks into the soil, so the correct choice is the phosphorus cycle.
AI-written and checked against the verified answer.