A way to categorize information and point you to where to find that information is called a table of contents
Answer:
ation, basion, cation, dacian, dation, gratian, haitian, haitien, and hatian (I hope this works)
Answer:
Depends on how much you want to learn really, schools usually just make you learn all sorts of parts of the subject. Some that could be necessities and some that you would rarely use.
Explanation: