Final answer:
The brain and sight work together to help you pour water from a tall glass into a short glass by using visual perception and depth perception. The eyes detect the water level and the brain processes this information to accurately pour the water without overflowing.
Step-by-step explanation:
When you pour water from a tall glass into a short glass, the relationship between the brain and sight allows you to successfully complete this task by using visual perception and depth perception.
The eyes detect the light and form images of the water level in the tall glass.
The brain then processes these images and combines them with other visual cues, such as the perception of depth, to accurately estimate the water level and pour it into the shorter glass without overflowing.