Dumbo and his Dad are at the zoo. "Look at those huge foots!" exclaims Dumbo, as they watch an elephant in its cage. Dumbo's error in speech best demonstrates

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Quizplus · Accepted Answer

Dumbo's error in speech, using "foots" instead of "feet," is an example of overregularization, where a child applies a regular grammatical rule to an irregular word (e.g. adding -s to make the plural). It is a common stage of language development.

B) Telegraphic speech is the use of short, simple phrases without articles or other grammar words (e.g. "Me go outside"). 
C) Overextension is when a child uses a word too broadly to refer to many different things (e.g. calling all four-legged animals "doggie"). 
D) Holophrasing is using a single word to express a complete thought or sentence (e.g. "Juice" meaning "I want juice").

Dumbo and His Dad Are at the Zoo