Sonogram machines allow parents of a fetus to know the gender before birth, therefore encouraging gendercide for parents who do not desire a child of a specific gender, sometimes leading them to decide to terminate.
The accretionary wedge is like the accretionary prism and the definition of that is : *a mass of sedimentary material scraped off a region of oceanic crust during subduction and piled up at the edge of the overriding plate (source : dictionary)* and the formation is when two plates crash and one slides under the other one I believe and sand ad sediment go into the little open space between them that give you a wedge. Hope I helped.
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actually you can pick any of those
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