Answer: (3) Inter-modal perception
Explanation:
The inter-modal perception is helps in coordinating the different types of perception by the improving the development rapidly. It basically helps in coordinate the stimulation from the multiple inter modal perception.
According to the given question, baby grace hear and also sees the bouncing Ball and she is demonstrating the inter-modal perceptions as both hear the sound of the ball as well as recognized the ball picture.
Therefore, Option (3) is correct answer.