It will stay archived until you delete it, otherwise it won't be deleted but it will reappear to Inbox if the person sends you another message.
The sender. (The terms messenger and message are applied to the carrier of messages.)
a troll
Axon sends the message. Dendrite receives it.
contract
A communication pattern in which the person sends the same message on both verbal and nonverbal levels.
You can't. Also, facebook sends the message for the other person, so the connection isn't direct.
The answer is Eye Contact, Eye contact sends the message that you're interested in what the other person has to say
It depends what the message is.
Without feedback, the person who speaks or otherwise sends a message can never know whether or not that message is actually understood.
myelinated
your bladder sends a txt message to your spine. your spine then IM's ur brain and it goes to sleep