Chemical runoff from fields, oil spills, and erosion is the major source? a. air pollution. b. water pollution. c. hydropower. d. nuclear power

B (Water pollution)

Explanation:

Water pollution is the release of harmful substances -often chemicals and microorganisms- into a water body e.g. stream, river, ocean, lake etc. degrading the quality of the waterbody and rendering it toxic to humans or the environment.

Water is regarded a universal solvent i.e. it has the ability to dissolve more substances than any other liquid on earth. This is the reason why water is vulnerable to pollution or easily polluted as toxic substances readily dissolve into and mix with them, causing water pollution.

Water bodies can be polluted by a variety of substances causing contamination due to pathogenic microorganisms, domestic wastes (sewage and refuse), insecticides, herbicides, food processing wastes, volatile organic compounds, heavy metals, oil spillage from industries, chemical wastes from farms etc. These substances are called POLLUTANTS.

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d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !