Final answer:
The best theory that would provide an explanation for the Eskimo children's choice is Sociocultural learning theory.
Step-by-step explanation:
The best theory that would provide an explanation for the Eskimo children's choice of selecting airplane as a choice is (b) Sociocultural learning theory. Sociocultural learning theory emphasizes that individuals learn by observing and imitating others within their cultural context. In this case, the Eskimo children may have observed airplanes as the only form of motorized transportation that comes into their remote village, leading them to select it as a choice on the vocabulary test.