Why decomposers play an important role in ecosystem​

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

What is the problem in this article? what solution does the article propose?