In the interaction between the boy and his caregiver, which action best promotes the boy's communication skills?

Discussing the swingset explicitly is the action that best promotes the boy's communication skills because it encourages verbal interaction and vocabulary development. When caregivers talk about specific items, such as a swingset, they provide an opportunity for the child to learn new words and concepts associated with that subject. This kind of explicit discussion encourages the child to express thoughts, ask questions, and engage in dialogue, which are critical components of developing strong communication skills.

This type of interaction allows the caregiver to model language use and can lead to further exploration of ideas and physical activity associated with the swingset, such as discussing safety, feelings associated with playing, or the mechanics of swinging. Engaging in meaningful and relevant conversation helps the child develop both receptive and expressive language skills, which are fundamental in early childhood communication development.