Describe the process of eutrofication by placing these steps in the correct order: Question 1 options: Underwater plants die, underwater photosynthesis declines and bacteria consume dead plants. Excess nitrogen and phosphorous, from fertilizers, drain from a watershed into surface water. Excess nutrients in surface water promote the overgrowth of aquatic plants, especially algae Algae blooms block sunlight that underwater plants need to survive. Dissolved oxygen levels drop.