Answer:
well, what we can do here is eliminate what we know. It's not A, because <u>ALL</u> living organisms reproduce. (examples include humans, cows, plants, etc.) for now, until we see the other answers, we will skip b. It can't be C, because on a trusted website, it states that <em>the unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory. ... All organisms are made up of one or more cells. </em>
If we take a look at D, It could be true because in another trusted website, it states that <em>Oxygen helps organisms grow, reproduce, and turn food into energy. ... Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration. </em>So, Looking back up to B, it seems less likely now that we've viewed everything. D is the answer, I wasn't paying attention earlier, haha.
<h3><em><u>Hope this helps! brainliest is appreciated :)</u></em></h3>