gene flow or migration between two populations will help maintain similarities between the species, therefore preventing (or slowing down) the process of speciation. and when the environment changes rapidly, this can cause an overall decrease in population size because of a failure to adapt adequately to environmental changes. i hope this helped <3
<h2> hope it helps.</h2><h2>stay safe healthy and happy.</h2>
The answer is D: test possible choices and then avoid ones that are not desirable.
