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Well-sorted sediments have grains of similar size, and are the result of much sediment transport and earth processes which segregated the sediment by depositing different size fractions in different places.
According to Kinsey's sexual behavior study, approximately 21 percent of men and 6 percent of women had sexual intercourse by the age of 16. (Please mark me brainliest! thank you in advance!!)
Answer:
I'm pretty sure the answer is natural selection.
Explanation:
Natural selection acts on phenotypic variations in populations.