Decomposition is a help to the nitrogen cycle because it is one of the many ways that nitrogen is returned to the earths soil. That's because when something dies before the nitrogen can get out of that plant or animal, but with the help of decomposition which reads down the body and the nitrogen goes back out into the soil.
THIS TREE HAS LICHENS WHICH IA PART OF DECOMPOSITION BECAUSE LICHENS SOMETIMES GROW WHEN THERE IA A PLANT OR TREE THAT IS DYING OR IS STARTEING TO DECOMPOSE..
This is decomposition because this tree has been laying on the ground broken for some time but when after it lays there for maybe a year it will decompose by lichens or by mushrooms.