Imagine that you saw a Usenet posting with something particularly funny in it and saved the posting to a file. How would you incorporate this file into your own buffer? What if you wanted to use only a couple of paragraphs from the posting? How would you add > to the beginning of each included line?

What will be an ideal response?

To read a file into the current buffer, move the cursor to where you want to
add the file and give the command CONTROL-X i (insert-file).
There are several ways to add only a few paragraphs from a file: You can
read the entire file and delete the parts you do not want. Alternatively, you
can read the file into its own buffer with CONTROL-X CONTROL-F , kill the part you
want, go back to the original buffer with CONTROL-X b (switch to buffer), and
yank the killed text with CONTROL-Y.
To place a greater-than sign followed by a SPACE at the beginning of each line
of the new text, place the cursor at the beginning of the new text, give the
command META-x query-replace-regexp ^RETURN >SPACE RETURN, and respond with
SPACE to each prompt until you reach the end of the new text; then respond
with RETURN.