Which of the following sources of pollution decrease the oxygen level of water? Select the two correct answers.(1 point) Responses plant fertilizer plant fertilizer radioactive substances radioactive substances toxic metals toxic metals animal manure animal manure gasoline

Answer 1

The two sources of pollution that decrease the oxygen level of water are:

1. Plant fertilizer - When fertilizers runoff into water bodies, they can lead to algal blooms, which consume oxygen when they decompose, resulting in decreased oxygen levels.
2. Animal manure - Similar to plant fertilizers, animal manure can also cause nutrient pollution, leading to algal blooms and subsequent oxygen depletion in the water.

So the correct answers are plant fertilizer and animal manure.