It gives you an imagination of what the chapter is going to mainly be about. Or what content is going to be spoken about in the chapter
Answer: The answer is D.
Explanation: It is because when the writer uses the word "for example". It usually means that they are going to give an example related to the idea that they were talking about.
D
Explanation:
because its things that are combined together
It would be altogether, because all together is two words.