Question

Treatment of polluted water is carried out with the help of ?

• A. Lichens
• B. Fungi
• C. Ferns
• D. Phytoplankton

Answer 1

The correct option is B Fungi

The polluted water specifically rich in organic matter is required to e treated with decomposing microbes like fungi and bacteria in the sewage water treatment units. These break down the organic matter into simpler inorganic compounds, thereby making sure that the water does not have high biological oxygen demand when released in the rivers and lakes. Furthermore, the microbial treated water is given chemical treatment so that any harmful microbe, if present, can be killed. Lichens are used as pollution indicators. Phytoplanktons are the producers in the aquatic food chain

So, the correct answer is 'Fungi'