What demonstrates a child’s ability to combine words as they approach 100 unique combinations?

The demonstration of a child’s ability to combine words as they approach 100 unique combinations is exemplified by the rapid acceleration of new combinations. As children's language skills develop, they not only increase their vocabulary but also enhance their capacity to create new phrases and sentences using the words they know. This period is characterized by a significant increase in the number of unique word combinations, showcasing their growing understanding of language structure and the rules of syntax.

This phenomenon reflects a critical stage in language development where children begin to experiment with language creatively, demonstrating both cognitive growth and an understanding of how to construct meaning through word combinations. The ability to combine words effectively points to important advancements in language processing and communication skills, indicating that the child is actively engaging with language in a sophisticated manner.

In contrast, the other options represent scenarios that do not align with this developmental milestone, focusing instead on different aspects of speech and language development that do not specifically indicate the ability to form unique word combinations.