Answer:
The offspring are genetically distinct from the parents because they are produced by sexual reproduction. -C.
Dolphins doesn't have vocal cords, on the other hand generating
sounds is a complex system of shrieks, Squeals, groans, trills, and clicks are generated
by their sphincter muscles inside the blowhole. <span>The
sphincter muscle is a circular </span>muscle<span> that usually retains contraction of a natural
body passageway or opening, which relaxes as required by normal physiological
functioning</span>
Genetic drift I believe because it means <span>variation in the relative frequency of different genotypes in a
small population, owing to the chance disappearance of particular genes
as individuals die or do not reproduce.</span>