Answer:
This section of writing is called a paragraph
Explanation:
This section of writing is called a paragraph. A paragraph, is a series of related sentences developing a central idea, commonly known as topic. A paragraph, could also be a group of sentences or a single sentence that forms a unit. Paragraphs, shows the reader the divisions and subdivisions of the central idea; and it helps us grasp the main points. Regardless of the kind of information it might have or contain; it is always related to the main topic.
To add a more personal touch and to express his/her opinion
A; therefore would be the best transition to fit the blank
