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In the grocery store, 3-year-old Alberto holds the shopping list for his mother and studies a box of Cheerios as he sits in the shopping cart. Hiss older brother, who is 7, is searching for a can of soup that says “tomato.” When he has found the soup and they move on to the next aisle, and his mother will have another job for each of them. Alberto's mother is skillfully engaging her boys with the shopping, and the children are enjoying themselves in an activity with their mother. The activity helps the children learn about their ______ _____.
What is their social world?