Which of the following is an example of variegated babbling?

Variegated babbling is characterized by the production of a variety of consonant-vowel combinations by infants. In this stage, babies move beyond simple repetitive sounds and begin to mix different syllables together. The example of a mix of syllables, such as 'babadadu', perfectly exemplifies this concept because it showcases an infant's ability to experiment with varied sounds rather than sticking to a single, repeating sequence.

This combination of different syllables represents a developmental milestone in language acquisition, indicating that the child is not only practicing their vocalizations but also developing the motor skills necessary for speech. The ability to create a sequence like 'babadadu' signifies advancements in cognitive processing, allowing infants to imitate the rhythm and patterns of adult speech.

In contrast, consistent repetition of sounds refers to what is known as canonical babbling, where the same syllables are repeated, showing less variety. Speech with meaning interruptions is beyond the babbling stage, indicating the use of words or phrases with specific meanings. Nonsensical speech resembling adult patterns could suggest more advanced vocalization but doesn’t strictly fit within the definition of variegated babbling. Hence, the mix of syllables is the most accurate representation of this language development stage.