cautioning recreation Lake, about a potentially harmful bloom of blue-green algae. It can be harmful to small children, anyone with illnesses and to animals. NO swimming or fishing until further Jack and Emma are stumped, they have never heard of algal blooms before, and have never seen them at Rough River. Jack decides to do some research. The table below is what he finds: Algae are an invasive species at Rough River. They use sunlight to make food. When large amounts of algae grow together, they can form algal mats. These mats can float on the surface of the water and block out sunlight. Algal blooms can be cause by: Warm weather Sunlight Slow-moving water (so they aren't dispersed) High levels of nutrients, nitrogen, and phosphorus (food for the algae) that enter the water from the air, water or groundwater 1. Which algal bloom causes listed below is a biological disruption? A. Increase in temperature B. Slow-moving water C. Increase in sunlight D. High levels of nutrients E. Groundwater F. None of the above ​