Lloyd Demetrius argued that the convexity of plots named for this process equals evolutionary entropy when fecundity is set constant. An estimator for this process is defined as “1 minus the hazard function” and is plotted as a series of horizontal steps. The COX regression (10[1])and Kaplan–Meier models can be used (10[1])to estimate this process’s decline over time. A graph describing the rate of this process contains a “type III” curve associated with r-selection and a “type I” curve (10[1]-5[1])associated with K-selection. Those curves named for this process display a negative correlation between brood size and the rate of this process. This process stops contributing to an organism’s fitness after it becomes infertile due to age. For 10 points, name this process that, according to an adage summarizing natural selection, is accomplished by “the fittest.” ■END■ (10[1]0[1])