The model of communication stating that giving and receiving messages is simultaneous and mutual is called the

The model of communication stating that giving and receiving messages is simultaneous and mutual is called the transactional model. This model describes the communication as an ongoing and continuously changing process.
Each person in the communication act in the transactional model is both a speaker and a listener.
This means that the elements in communication are interdependent.

The correct answer is the transactional model.

The transactional model of communication states that communication that occurs between two parties is a back-and-forth transaction, where messages are given and received simultaneously by both involved parties. The transactional model of communication was originally developed by Dean Barnlund in 1970. 

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.