The image presents four density plots, each depicting the relationship between the fraction of null with p < 0.05 and the density of test with p < 0.05. The top row shows the density of test with p < 0.05, the middle row shows the density of test with p < 0.05 and the fraction of test with p < 0.05, and the bottom row shows the density of test with p < 0.05 and the fraction of test with p < 0.05.