A. private correspondence b. congressional hearings
c. print journalism
d. classroom discussions

those sounds of the natural world are bioacoustics, and they're more than a false-color spectrogram of data from the musiamunat conservation area.

answer; no longer than a reasonable period of time;

answer; ///any two strangers are likely to share many coincidental similarities;

answer; /// direct cinema limits the use of narrators; ; ; and: : : : allows the audience to observe events as they occur;