Answer:
D
Explanation:
It sounds more fluent when you say it, while the other options are a bit weird sounding
A one-way transmission of messages is how Early theories of communication viewed public speaking.
A series of one-way messages sent from speaker to audience is how public speaking was viewed as per the early theories of communication
The audience joins to participate with the speaker in making shared meaning and understanding.
I'll say the answer is D, or 4, since the Aztecs did expand over the warm tropical lowlands and the cool tropical highlands which would allow them to have more options in terms of which kinds of crops could be grown.