Which is the topic sentence of the following paragraph? determining the order of ideas in a paragraph is essential to producing a clear and understandable paragraph. a writer who aimlessly presents ideas the reader will not be very successful in presenting his or her ideas. topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea. adding support is key.

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.