Which of the following are part of the visual dimension of non-verbal communication?

The visual dimension of non-verbal communication includes physique, gender, and skin colour.

Physique, statement 1, is visual because a person's build and body shape are perceived by sight and carry social impressions.

Gender, statement 2, belongs here since gendered appearance is read visually and shapes how a communicator is seen.

Skin colour, statement 3, is likewise a visible bodily attribute that observers perceive with the eye.

Vocal tone, statement 4, is not visual but auditory and paralinguistic, since it is heard rather than seen.

Simple language, statement 5, is a matter of verbal communication and word choice, not part of any visual, wordless channel.