Essays / Literature Review in Software Engineering [2]

Hi everyone,

This is my first time posting a question here on this website so please correct me if I'm wrong. Alright my problem is I'm supposed to write a Literature Review for my final year project in Software Engineering. I've done quite a bit of reading what a literature review is but I'm quite confused. According to what I understand, in a literature review each sentence discusses whatever previously done work (like we find some sources and paraphrase them into our own words). My confusion is that what if a particular sentence that I wrote in my literature review hasn't been covered by someone else? For instance, my topic is about "eating habit" and in my introduction of the literature review I wrote "For the survival of every human beings, each of us need to have food supplies blur blur blur". Can I include a sentence like that because I think everyone knows that we must have food supplies in order to live i mean do i need to find sources just to write that sentence in my literature review ? I mean is it a must that every single sentence must have citation and its own reference ? Thanks everyone in advance.

Best Regards