What affect do algae blooms have on ocean ecosystems?(1 point) increased underwater plant population decreased carbon dioxide in the water increased fish population decreased oxygen in the water

An algal bloom affects the whole ecosystem. Consequences range from the benign feeding of higher trophic levels, to more harmful effects like blocking sunlight from reaching other organisms, causing a depletion of oxygen levels in the water, and, depending on the organism, secreting toxins into the water.

This is giving me a headache i have asked others and they don’t know it either