Correct Option (B)
The passage explicitly details the consequences of indiscriminate fertilizer use, which align with statements 1, 3, and 4.
1. Addition of pollutants to the soil and water: The passage describes "excess input of the nutrients, both nitrogen and phosphorus – based, from agricultural runoff" leading to significant ecological damage, including the transformation of healthy lakes into eutrophic conditions and the creation of oceanic "dead zones." These excess nutrients, when causing environmental harm, function as pollutants. The text also mentions that proper management "converts pollutant into fertilizer," implying that unmanaged or excessive application results in pollution.
3. Nutrient enrichment of water bodies: The passage directly states that "excess input of the nutrients... from agricultural runoff... has caused many ‘healthy’ oligotrophic lakes... to change to eutrophic condition where high nutrient lead to high phytoplankton productivity." This clearly describes the nutrient enrichment of water bodies.
4. Creation of algal blooms: As a direct consequence of nutrient enrichment, the passage notes that "high nutrient lead to high phytoplankton productivity (sometimes dominated by bloom-forming toxic species)." Furthermore, it mentions "decomposition of algal blooms, fueled particularly by nitrogen from agricultural runoff of fertilizers," confirming the creation of algal blooms.
Incorrect Options:
2. Destruction of decomposer microorganisms in soil: The passage states, "Soil microorganisms decompose the organic components of sewage and slurry and most of the mineral nutrients become available to be absorbed again by the vegetation." This indicates that soil microorganisms are active in the decomposition process, facilitating nutrient cycling, rather than being destroyed by the indiscriminate use of fertilizers.