You observe Maria organizing all of her Barbie and Ken dolls into separate piles. One pile consists of

brunette Barbies; one pile consists of blonde Barbies; and one pile consists of all Ken dolls. Which of the
following concepts are you observing?
A. Counting
B. Measuring
C. One-to-one correspondence
D. Classifying

my answer is d.

Right.

Thanks

Your answer is correct. The concept you are observing in this scenario is classifying. Classifying involves organizing items into groups or categories based on their shared characteristics. In this case, Maria is categorizing the dolls based on their hair color (brunette Barbie dolls, blonde Barbie dolls) and their gender (Ken dolls). This process of sorting and grouping the dolls into separate piles demonstrates the concept of classifying.