Which form of social referencing involves only eye contact?

The correct choice is nonverbal social referencing, which encompasses various forms of communication that do not involve spoken language, including the use of eye contact. In situations where a child looks towards a caregiver and makes eye contact, they are relying on the caregiver's facial expressions and emotions to interpret a social situation or an object's significance. This method of social referencing is essential for learning how to navigate social interactions and assess the safety or emotional tone of a situation.

In contrast, gesturing involves specific movements or signals to communicate a message or request. Verbal social referencing specifically includes spoken communication, while interactive social referencing would encompass a broader approach that may involve both verbal and nonverbal cues along with a more engaged social interaction. Thus, these other forms do not focus exclusively on the eye contact aspect, making nonverbal the most accurate answer in relation to eye contact alone.