Surface runoff from urban areas can contain high levels of pollutants. The pollutants in the surface runoff that flows into the ocean A creates food sources for native marine fish. B helps native marine fish adapt to freshwater. C poisons and kills off many native marine fish. D carries many native marine fish to lakes.

i am going to guess that it is co2.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.