The document discusses 3 areas of development - physical, cognitive, and social-emotional - in 4 children. It asks the reader to: 1) Describe examples from each child that demonstrate the same developmental concept, stage, or event in the 3 areas. 2) Describe any differences between the children in the 3 development areas and attribute them to environmental factors like parenting, nutrition, family structure. It provides a rubric for grading a homework assignment analyzing developmental issues in babies based on a video about physical, cognitive, and socio-emotional development.