Question

question 2 1 pts
what causes eutrophication of a body of water?
○ the build-up of toxins in the system over time.
○ the introduction of a non-native species of plant or animal.
○ a significant decrease in the amount of sunlight reaching the bottom.
○ an increase in the nutrients available to the primary producers.

question 3 1 pts
eutrophication only occurs when humans add nutrients to a body of water.
○ true
○ false

Explanation:

For Question 2: Eutrophication is driven by excess nutrients (like nitrogen and phosphorus) that fuel overgrowth of primary producers (algae, plants). The other options describe different aquatic disruptions, not eutrophication.
For Question 3: Eutrophication can occur naturally, such as from nutrient runoff from natural soil erosion or decaying organic matter, not only from human activities.

Answer:

Question 2: An increase in the nutrients available to the primary producers.
Question 3: False