A bomb threat can be received by telephone or what other method?

A bomb threat can indeed be received through a written note, which is a method that allows the sender to communicate the threat discreetly and without direct interaction. Written communications can include notes left in public places, letters sent through the mail, or messages delivered via electronic means, like email or text.

This method is particularly significant because it provides the authorities with tangible evidence of the threat, such as handwriting analysis, which can potentially help identify the individual responsible. In addition, written threats often come with specific details or demands that can be crucial for proper response protocols and investigations.

Other options like sight or smell do not represent methods through which a bomb threat is typically conveyed. Sight might involve the observation of suspicious objects but does not constitute a direct threat communication. Smell could be associated with detection of explosive materials but is not a method for receiving threats. Touch does not apply since bomb threats require a clear and explicit communication of intent, which is typically conveyed through spoken or written messages.