Apopulation of rabbits includes rabbits with pink noses spots and rabbits with black noses. a forest fire kills half the rabbits with pink noses. this is an example of genetic drift mutation gene flow natural selection

It's genetic drift, since a natural occurrence causes some rabbits do die and their genes to become less common

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.