SCIENCE
ENVIRONMENTAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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its great depth and particularly sticky sediment
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the mixing action of river water and ocean water
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its storing of pesticides from agricultural runoff and ocean water
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the filtering action of bottom-feeding fish species
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Detailed explanation-1: -Estuaries filter out sediments and pollutants from rivers and streams before they flow into the ocean, providing cleaner waters for humans and marine life.
Detailed explanation-2: -Estuaries commonly function as nutrient traps, in which nutrients (e.g., N and P) and organic-reactive elements (e.g., many trace metals) become concentrated through a combination of sinking organic matter (i.e., the biological pump) and proximally directed flow of the deep layer (Fig. 1A; Shiller, 1996).
Detailed explanation-3: -Estuaries transport and trap nutrients and sediment through the combined action of freshwater flow, wind, waves and tidal action.
Detailed explanation-4: -The amount of mixing between fresh water and seawater depends on the direction and speed of the wind, the tidal range (the difference between the average low tide and the average high tide), the estuary’s shape, and the volume and flow rate of river water entering the estuary.