What single celled organism may cause disease but it is also essential to important life processes like decomposition

Im pretty sure its bacteria, do you have an options to choose from?

Depends on which disease, but as a general rule eat healthy. many vegetables.                                                        hope my answer has come to your . you for posting your question here in we hope to answer more of your questions and inquiries soon. have a nice day ahead! : )     (p.s mark as brainliest if )