Which aspect is NOT part of forming speech?

The aspect that is not part of forming speech is using gestures. Forming speech primarily involves the articulation and organization of sounds and words. This encompasses the processes of putting sounds in the correct order, accurately forming sounds, and expressing emotions through tone—all of which are integral to the verbal communication of ideas and feelings.

Using gestures, while it can complement speech and enhance communication by providing visual cues and context, does not directly contribute to the phonetic and grammatical components of speech formation. Instead, gestures are part of non-verbal communication, which serves to augment or support spoken language rather than form it.