When there are no physical obstacles stopping any members of a species from mating with another and all members are close to one another, sympatric speciation takes place. A new species appears to emerge on its own, possibly based on a different food supply or trait. When populations of a species that share the same habitat become reproductively isolated from one another, sympatric speciation takes place. The most frequent way for this speciation occurrence to happen is by polyploidy, in which a offspring or group of off springs will be born with twice as many chromosomes as is typical. Sympatric speciation can happen when one individual has an abnormally low or high number of chromosomes, such that viable interbreeding is no longer possible (polyploidy).
Option A: a change in the Temporal (Time)
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Option A, a Temporal (Time) change is the answer for this question
