Della is 2¹/₂ months old.She is most likely in the cooing stage of language development.

Question

Quizplus · Accepted Answer

According to the language development milestone chart, infants between 2-3 months old typically enter the cooing stage, making vowel-like noises and developing their ability to produce different sounds. The notation 2¹/₂ indicates that Della is currently 2 months and 1 week old and is demonstrating certain physical and social behaviors (such as 1P for smiling) and communicative abilities (such as 1S for making sounds) that are typical for her age.

Della Is 21/2 Months Old

Della Is 2¹/₂ Months Old