C. Gradual
Hope this helps!
<span>B is the right answer. Gentoo and Emperor penguins employing different mating rituals is an example of behavioral isolation. Behavioral isolation is the umbrella term for a host of differences between species, although in the case of different mating behaviors this variety of behavioral isolation is intended to prevent cross-breeding between different members of the same species in the same environment.</span>
The answer for this is Connective
"<span>lactic acid fermentation of the grape juice by anaerobic bacteria" is one among the following choices given in the question that shows what caused this change. The correct option among all the options that are given in the question is the second option or option "B". I hope that the answer has helped you.</span>
