Answer:b. similarity
Explanation:Similarity refers to how our eyes tend to group together everything that share similar characteristics. Similarity is driven by similar colors, shapes , and size. If we see things with the same shape, color, texture ,value or orientation we perceive them as things that belong together.
For example Jimmy is grouping together the red cardinals birds and grouping the brown cardinals birds separately from the red ones because in our percetions the red one will belong to one group since they share the similar color