Which of the following indicates developmental delays in an infant's psychosocial development?

The correct answer highlights a significant indicator of psychosocial development in infants. A lack of response to parental touch can be emblematic of broader issues in emotional and social bonding. Touch is a critical form of communication and connection for infants, fostering attachment and trust between the caregiver and the child. When an infant does not respond to this tactile stimulation, it may suggest difficulties in relating to others, emotional engagement, or sensory processing, all of which are essential components of psychosocial development.

In contrast, while delayed physical milestones and poor feeding habits may indicate some form of developmental concern, they are not direct indicators of psychosocial development. For example, delayed physical milestones typically pertain more to motor skills and physical growth rather than emotional or social interactions. Similarly, poor feeding habits might stem from various issues, including physical or medical concerns, rather than directly reflecting an infant's ability to form social connections.

Failure to establish eye contact can also be a concerning sign regarding interpersonal engagement and an indicator of psychosocial development delays. However, it should be noted that the context in which eye contact is established can vary among infants. In contrast, the lack of response to parental touch is a more clear-cut signal of potential issues in emotional and psychosocial development.