Our world is filled with people, activities, events, places, and things. Keeping track of them as we add more each day requires a bit of strategy. The information we gather about them allows us to notice similarities and we are inclined to group them accordingly. We distinguish a basic difference between a person and a thing, an action and a place. We know when one belongs to a certain group or not. We name these groups and we can recall what we consider members of a group by thinking about the general characteristics of the broad category or sub category we are thinking about.
Considering two items and identifying similarities and differences is a critical aspect of learning. It is a first step in beginning to think more abstractly about what we see and we use language to do this. The naming of our associations and groupings and the words we use to describe them provide us with a way to preserve these mental structures and access them when we consider new information.
Three Little Pigs Story