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Presence of high amounts of organic wast...

Presence of high amounts of organic wastes in the sewage decreases both BOD and DO.

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**Step-by-Step Solution:** 1. **Understanding BOD and DO**: - BOD stands for Biochemical Oxygen Demand, which measures the amount of oxygen that microorganisms will consume while decomposing organic matter in water. - DO stands for Dissolved Oxygen, which is the amount of oxygen that is present in water and is available for aquatic organisms. 2. **Impact of Organic Waste on BOD**: - When there is a high amount of organic waste in sewage, it provides a food source for bacteria and fungi. ...
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