Explanation: in the given paragraph we can see that the speaker is describing how the students discard large amounts of uneaten food during lunch, which ends up in a landfill, producing pollution and gases that harm the environment. In the first sentence, the writer says that he has noticed this problem, which implies that he uses this sentence to clarify that he is expressing his point of view.
Paraphrase means when we restate some text, passage or work. The vitality of paraphrasing is that the writer should keep the meaning or content of the restated words intact.
Paraphrase is used when using generally accepted information.
