The diagram below shows the desalination process. which best explains what happens to water during this process? it enters the plant from the ocean, salt is removed from it, and it exits the plant in the form of freshwater. it enters the plant from the ocean, salt is added to it, and it exits the plant in the form of freshwater. ocean and freshwater are mixed together, salt is added to it, and it exits the plant as salt water. ocean and freshwater are mixed together, salt is removed from it, and it exits the plant as freshwater.