In sociology, [ ] includes institutions, technologies and messages; [ ] can reach large audiences.
In sociology, media includes institutions, technologies and messages; mass media can reach large audiences.
In sociology, an audience includes institutions, technologies and messages; mass media can reach large audiences.
In sociology, media ownership includes institutions, technologies and messages; personal communication can reach large audiences.
In sociology, media includes institutions, technologies and messages; interpersonal communication can reach large audiences.