Please help me with this question it is difficult for me!! Explain, with examples, the impact of the continual re-use of materials in nature. NB: the role of decomposers in the Carbon cycle, Nitrogen cycle- nutrient cycling and the Water cycle.

I’m not sure I fully understand the question, but all of the examples given are closed systems, where a limited amount of material is available, and is recycled through the system continuously. For example, nutrients that are taken up by a plant are released when that plant dies and decomposes, and can then be taken up by another plant.

2hydrogen and 1 covalent