Define "expressive language delay."

An expressive language delay specifically refers to a situation where an individual has difficulty conveying their thoughts, ideas, or feelings through verbal communication. This means that the person may have the ability to understand language spoken to them, but they struggle to produce their own speech effectively. This may manifest as a limited vocabulary, difficulty constructing sentences, or challenges in articulating what they want to say.

The correct choice captures the essence of expressive language, which is fundamentally about the output of language and how it can impact an individual's ability to communicate effectively in social and educational contexts. Being able to express oneself verbally is crucial for social interactions and developing relationships, making this delay particularly significant in language development.

In contrast, the other options focus on different aspects of language and communication. The first option addresses reading and writing abilities, which pertains more to literacy than verbal expression. The third option refers to receptive language, which is the ability to comprehend spoken language, not the ability to express oneself. The fourth option relates to non-verbal communication skills, like gestures or body language, which do not necessarily encompass verbal communication. Thus, while they are all related to communication, only the identified choice directly defines expressive language delay.