Hi,
I would say the best choice is C, <span>sensory appeals are made up of imagery. </span><span>
~Elisabeth</span>
Hello. You didn't show which words are underlined, so I'll give you the grammatical name and function of all of them.
What: Pronoun. It has the function of referring to or replacing a noun, representing something, which does not have a specific name, but which needs to be represented in the sentence. The pronoun is a variable word.
To do: Verb. It has the function of representing an action, an activity that will be performed by something or someone.
Is: Verb. It has the ability to represent a state or occurrence.
Problem: Noun. It has the function of naming something or someone.
1/7, 2/14, 3/21, 4/28, 5/35, 6/42, 7/49, 8/56, 9/63, 10/70, 11/77, 12/84, 13/91, 14/98, 15/105, 16/112, 17/119, 18/126, 19/133, 20/140 ...
One of the answers that could fit in the blank is better.
Hope this clarifies your doubt.
