We observe a frog that carries its babies on its back away from where the eggs hatched. Below are two questions about this observation.
(X) Does the frog do this to move the babies to place where they will be safer?
(Y) Why does the frog expend time and energy moving its offspring from the place where they were "born"?
Which of the two is a true causal question?
a. X, because this is the more specific of the two questions
b. X, because we can test this idea but not the idea presented in Y
c. Y, because this statement tells what we should expect to find in nature
d. Y, because it is not a hypothesis itself but could be answered by a hypothesis