Introduction.
A book's introduction is closely related to the content of the book itself. Usually found in nonfiction work, the introduction may summarize the main argument presented in the rest of the book, define any important terms, or fill in background details.
Answer:
Subject
Explanation:
Your sentence always needs a subject if not then your sentence would make no sense because you wouldn't be talking about a certain thing.
Explanation:
do u think u could tell more on the question then I will answer?
