A persons biological because its the only one that makes sense according to the study of genetics. EX: X chromosome are always in females eggs, while the x & y chromosome is in the male.
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When frequency increases more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases.
Explanation:
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I think the answer is c or d. Let me know if that is wrong or right.
