The answer is B) They are always focused on a main idea.
Paragraphs are not always indented; it depends on the writing format. They vary in length from short to long. They do not always have a topic sentence; some writers organize their thoughts and paragraphs well without topic sentences.
Hope this helps! :)
You can use it when the actor is unknown or when the actor is <span> irrelevant. hope this helped :)</span>
