Individual languages are variations on a single pattern. This is referred to as

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Quizplus · Accepted Answer

The statement is referring to the idea of universal grammar, which suggests that all languages have a common underlying structure or set of rules that enable humans to learn language. This is supported by evidence such as the fact that all languages have grammatical categories like nouns and verbs, and that children from all cultures learn languages in similar stages. The other options are not quite on topic - while language is a learned behavior, this doesn't specifically relate to the idea of variations on a single pattern, and the last two options are not quite accurate (babbling isn't truly universal, and comprehension and speech typically develop simultaneously).

Individual Languages Are Variations on a Single Pattern