The topic sentence is usually (but not always) the first sentence in a paragraph or a sentence that explains what you will be reading about.
The answer is A) Each paragraph should have a topic sentence, support, and a concluding sentence. This is because this sentence is talking about what you will basically read about in the rest of the paragraph.
i like it. its something people need to understand because theres a diffrence. i t makes sense to me so im pretty sure whoever your sending it to will understand it. good stuff dude