Why are competition, predation, herbivory, parasitism, disease, and stress from
overcrowding density-dependent limiting factors?

They are all sources of potential population depletion or death, and they can prohibit growth of a species.

Top 10 Vitamin C Foods List1) Oranges. 1 large: 82 mg (over 100% DV)2) Red peppers. ½ cup chopped, raw: 95 mg (over 100% DV)3) Kale. 1 cup: 80 mg (134% DV)4) Brussels sprouts. ½ cup cooked: 48 mg (80% DV)5) Broccoli. ½ cup cooked: 51 mg (107% DV)6) Strawberries. ½ cup: 42 mg (70% DV)7) Grapefruit. ...8) Guava.