Multiple choice

What kind of feedback loop is runoff of nutrients into lakes? why?

  1. positive feedback loop;algae decrease

  2. negative feedback loop;algae increase

  3. positive feedback loop;algae increase

  4. negative feedback loop;algae decrease

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nutrient runoff causes a positive feedback loop because the influx of nutrients leads to an increase in algae, which can lead to further ecological changes that promote more algal growth.