When Casey sees eight candies on the table that are placed like those below, she asks which two children get the candies. How would a Gestalt psychologist explain Caseys tendency to view the candy in two groups rather than as eight separate candies?

When Casey sees eight candies on the table that are placed like those below, she asks which two children get the candies. How would a Gestalt psychologist explain Casey?s tendency to view the candy in two groups rather than as eight separate candies?
All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations.
 
Textbook is Wade, C., Tavris, C., & Garry, M. (2014). Psychology (11th ed.). Upper Saddle River, NJ: Pearson Education
textbook is not a required reference but a reference is required refered and/or cited in APA format
 
I know answer is  This is an example of the Gestalt principle of proximity.