Which behavior indicates a warning sign for children aged 11 to 12 months?

A behavior that indicates a warning sign for children aged 11 to 12 months is a lack of response to familiar people. At this age, children are typically expected to develop social responsiveness, which includes recognizing and responding to familiar faces. This social engagement is crucial for building connections and encourages emotional and cognitive development. When a child does not respond to familiar individuals, it may suggest delays in social, emotional, or cognitive development, highlighting the need for further observation and possible intervention.

In contrast, behaviors such as crawling towards toys enthusiastically, following simple commands, and showing interest in caregivers are all positive indicators of development at this age. These actions demonstrate curiosity, physical development, and an emerging ability to interact with their environment and caregivers, reflecting typical milestones in early childhood development.