Answer:
D.) It is used as a verb to describe the main action of the sentence.
Explanation:
Shrieking is a verb because it is an action, it wouldn't be a verb if it was shrieked but in this case it is ending with <em>-ing</em>, therefore the action is taking place at the moment.
Hope this helps and if the explanation is unclear, I apologize.
Answer:
C - End of the introduction
Explanation:
In an informational text/essay/ composition, the thesis statement should be placed at the end of the introduction so you give the reader the main idea you are going to develop later on. Then you write the body paragraphs providing information to support your thesis statement