Answer :
Martin Luther King Jr. was the sender and the people were the receiver.
Sender: Martin Luther King Jr. - he is the one who gave the speech
Receiver: everybody - he was trying to inspire African Americans, but he was also raising awareness and trying to argue for black rights from the white population
Receiver: everybody - he was trying to inspire African Americans, but he was also raising awareness and trying to argue for black rights from the white population
