Ethan is giving a highly technical presentation on biomedical engineering involving several working models, computerized graphs, and video clips to a small group of doctors, scientists, and engineers. which two characteristics of public speaking should he be most concerned with during his preparation?

Channel and Message.

Explanation:

I'm assuming the answer choices you'v e been given are:

a. delivery and audience

b. noise and delivery

c. channel and message

d. none of the above

And the most correct here is channel and message. He must speak with proper technical terms and factual information (message) so that he can convey his message properly to his audience (channel)

Hope this helps!

"freedom of speech, freedom of worship, freedom from want, and freedom from fear.

the four freedoms were goals articulated by united states president franklin d. roosevelt on january 6, 1941"

which lines ? : )

explanation: