Ana and Isabell were two girls born out of wedlock and lock…

 Ana and Isabell were two girls born out of wedlock and locked in the family’s attic until they were discovered by social workers around the age of five or six. Isabell was locked in the attic with her mother and was able to make crocking sounds when she was discovered. Isabell’s developmental skills enhanced after she was placed in a specialized group home. Ana died at the age of ten. Which requirement of socialization did Isabell experience, but Ana did not experience?