The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
The correct answer is a nutrient runoff.
Nutrient runoff is a major reason for eutrophication of surface waters, in which extra amount of nutrients, generally phosphorus or nitrogen, instigate growth of algae. Sources of nutrient pollution involve surface runoff from pastures and farm fields, emissions from combustion, and discharges from septic tanks.
Cells, the basic unit of life, are derived from spontaneous generation.
If you want faster replys or even replys at all, you need to give all the info.
Answer:
Design more studies testing the effect of duration and intensity of exercise on cholesterol levels in different age groups.
Explanation:
