Non verbal communication means talking to others in a negative tone.

No, this can mean having good posture, good eye contact, when you speak people see how your actions express what your saying. Also there can be negative non verbals like mean mugging, like the death stare, bad and angry posture.

Explanation:

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answer; (c); to assure that workers have the right to a safe workplace and that it is the employer's responsibility to provide safe and healthy workplace;