1 What is the term used to describe the living and non living things in your environment, which interact as system?
A ECOSYSTEM
B NICHE
C HABITAT
D. SURROUNDINGS

i would think it's dendrites

phosphorus cycle

explanation:

the phosphorus cycle is the way that compounds of the element phosphorus, an essential nutrient, are recycled in the environment. plants absorb phosphorus compounds from the soil, and decaying organic matter, including both plant matter and animal droppings, returns it to the soil. phosphorus is a vital part of atp, the energy currency of all cells, and is vital to all forms of life.