Do sit-ups they are challenging and fun
<span>Delayed gratification, or deferred gratification, is the ability to resist the temptation for an immediate reward and wait for a later reward. Generally, delayed gratification is associated with resisting a smaller but more immediate reward in order to receive a larger or more enduring reward later.</span>
I believe you are asking about the "triangle" we were tought a simple triangle. Cells at the bottom because there are the most of them, tissues next, organ next, and organ system at the top. So I believe the answer you are looking for is Organ System.
