Which of the following statements should a nurse include in a teaching plan for parents of a three-month-old infant?

At three months of age, infants typically begin to demonstrate early vocalization skills, including cooing and making more varied sounds. This indicates that they are starting to develop communication skills and are engaging with their environment through sound. Including information about vocal milestones in a teaching plan for parents helps them understand what developmental progress to expect and encourages them to foster communication by responding to their child's coos and sounds.

In contrast, while developing a grasp reflex is important, it is a skill that is generally present well before three months, and at this age, the emphasis is often more on gross motor skills like head control rather than fine motor actions. The ability to pull up blankets or clothes and achieving specific angles for head lifting are also milestones that may be relevant, but they focus more on physical development rather than communication skills, which are more pertinent at this stage of growth. Hence, discussing vocalization is particularly relevant for parents looking to support their child’s developmental progress at three months.