Visual elements could be any sort of illustration or photographs or diagrams. These can all set the tone of the writing.
B. Because you don't want to have a sentence that isn't complete in an essay
D is the most appropriate answer, so i would pick that one.
the Role of Mass Media is to communicate to a large audience a reflection of its own culture.
this culture is what influences Mass Media
The frequency of job layoffs is creating fear
I hope that's help and have a great day !