Question

how does water pollution harm water ecosystems? affect the color of water, causing water to absorb more energy from the sun. affect the acidity of water, causing pop. of primary consumers to increase. too many nutrients, causing algal blooms. algal blooms deprive waters of o2. too many nutrients, causing algal blooms. algal blooms deprive waters of co2.

Explanation:

Excess nutrients in water from pollution can lead to algal blooms. Algae consume oxygen during respiration and when they die and decompose, further depleting oxygen in the water, which is harmful to aquatic life. The color - change and acidity - change options are not the main ways water pollution harms water ecosystems in the context of the given choices, and algal blooms do not deprive waters of CO2 but of O2.

Answer:

Too many nutrients, causing algal blooms. Algal blooms deprive waters of O2.