What communication skill is typically displayed by children aged 3-4 years?

Children aged 3 to 4 years typically demonstrate the ability to form sentences that consist of 4 or more words. At this stage of development, they are increasingly capable of combining words to express more complex ideas and engage in conversations. Their vocabulary expands significantly, which allows them to articulate their thoughts and feelings with greater clarity. This skill is a vital part of language development as they start to share experiences, ask questions, and begin to use language more creatively.

In contrast, the other options reflect earlier stages of language development. For example, the use of single words is more characteristic of younger children, typically around the age of 1 to 2 years, while imitating gestures is also a foundational skill seen in toddlers. The idea that only friends can understand a child's speech might indicate a lack of clarity in communication, which isn't typical for this age group since children are generally becoming more intelligible to adults and peers alike as their speech skills progress.