Final answer:
Signed language, vision, and the brain have an interactive function in peripheral vision, spatial processing tasks, and rapidly represented visual information.
Step-by-step explanation:
The interactive function of signed language, vision, and the brain is essential in various aspects of visual perception. In terms of peripheral vision, the brain processes visual information received from the eyes and allows us to be aware of objects and events at the edges of our visual field. Spatial processing tasks involve the brain's ability to determine the location and orientation of objects in space, which is crucial for tasks such as navigation. Lastly, the rapid representation of visual information is facilitated by the brain's ability to process and interpret visual stimuli quickly, enabling us to make sense of our environment in real-time.