It is easier to train a dog to bark for food than to train it to stand on its hind legs for food.This best illustrates the importance of ________ in learning.

A) predictability
B) generalization
C) biological constraints
D) mirror neurons

Biological constraints refer to the natural limitations or tendencies that organisms have that make certain behaviors or learning easier or more difficult. In this case, dogs are biologically more inclined to bark for food (an instinctual behavior) than to stand on their hind legs for food, making the latter behavior more difficult to train.