When people see the mouth movements for "ga" while hearing "ba," they may perceive "da." this best illustrates:?

This best illustrates; the McGurk effect

The McGurk effect is a perceptual occurrence that shows a relationship between vision and hearing in speech perception. Under the McGurk effect, the visual information an individual acquire from seeing the mouth movement of a person changes to the way the sound is being heard. The McGurk effect influences many individuals differently and it relies on many factors, such as brain damage and other disorders.