Depends on what you're talking about. In fetus development?
I believe the answer is A
-Title/first sentence not generic
-you creative words don't start a sentence with common words
-structure- introduction, 2-3 body paragraphs, conclusion
-the introduction should introduce a question
-body paragraphs should develop a line of reasoning to answer the question
-the conclusion should summarize and the answer question.
-each paragraph should have a different point
-body paragraphs should be strongest to weakest points
Hope this is what you were looking for if you need more help message me
C or D. C because varying delivery isn't something that alot of people worry about, or D, because some times you don't need to use key words. I wouldn't trust myself with this answer, so be careful.