Physico-chemical characteristics of water in water sources undergo changes due to
- Aaquatic macrophytes
- Baquatic fungi
- CeffluentsCorrect
- Devapotranspiration
Explanation
The correct answer is C because effluents refer to liquid waste or sewage discharged into a river or the sea. These discharges typically contain harmful chemicals, heavy metals, organic pollutants, and industrial waste that directly alter the chemical composition and physical properties of the water, such as its pH level, temperature, dissolved oxygen, and turbidity. While other factors like aquatic plants or fungi can influence water to some extent, effluents represent the primary external cause of significant and harmful physico-chemical changes in water bodies.
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