What are visual scenes primarily composed of?

Visual scenes are primarily composed of photographs of places and people because they capture real-life environments and social interactions that can be easily recognized and understood by users. This format is beneficial in augmentative and alternative communication (AAC) because it allows individuals to connect their communication with actual contexts they may encounter in their daily lives. By using photographs, visual scenes can stimulate recognition and interpretation, making it easier for users to express themselves about familiar settings or situations.

The other options, while they have their respective utilities, do not serve the primary function of visual scenes in AAC. Text descriptions, graphs, and charts tend to convey information in more abstract or analytical ways, which might not be as immediately relatable for someone communicating using AAC. Hand-drawn illustrations can be expressive, but they may lack the clarity and realism provided by photographs that help users see and connect with the content in a more direct and impactful way.