Question

Although Darwin did not know about genes, he could see that animals of the same species who had slight
variations that helped them to survive longer could produce more offspring than animals who were not as
well equipped. Which of the following could be an example of a variation that would help a group of
animals survive?
A black bears in a region that was always covered with snow
B turtles with long necks on an island where the food source was elevated
C choosing a cat to take home from an animal shelter
D planting a certain kind of flower to attract butterflies