Correct option is D
To find the option that is related to Author in the same way that Brush is related to Painter, let's analyze the relationships:
A Painter uses a Brush as a primary tool to create their artwork.
Similarly, an Author uses a tool to create their written work.
Now, let's examine the options:
(a) Words: While authors use words, they are not a tool like a brush.
(b) Story: This is a type of work that an author can write, but it's not a tool.
(c) Book: This is a product of an author's work, but again, not a tool.
(d) Pen: This is a tool that authors use to write, similar to how a brush is used by a painter.
Conclusion: The option that relates to Author in the same way that Brush relates to Painter is: (d) Pen.