Question

What is a pen? What is book?​

Answer 1

Answer:

pen is an tube like structure that have ink in it and it is used for writing on paper.

book is nothing but a thing that give us knowledge according to our need

Answer 2

Answer:

A pen is a writing instrument used to apply ink to a surface, usually paper, for writing or drawing. Historically, reed pens, quill pens, and dip pens were used, with a nib dipped in ink. Ruling pens allow precise adjustment of line width, and still find a few specialized uses, but technical pens such as the Rapidograph are more commonly used. Modern types include ballpoint, rollerball, fountain and felt or ceramic tip pens.