What is the main purpose of visuals in a text?

Question

anonymous · Answer

A.
 
They help the writer to better understand what he/she is writing about.
 

B.
 
They add color and decoration to the text.
 

C.
 
They let the reader know the author's sources.
 

D.
 
They help fill in gaps that are not explicitly stated in the text.

anonymous_user · Answer

$\color{olive}{A.~They~ help ~the ~writer ~to ~better ~understand ~what ~he/she ~is ~writing ~about. }$

anonymous · Answer

As previously stated, A is the most logical choice.

anonymous · Answer

yeah it does seem the most logical but how would it help the writer? they already know exactly what they are writing about...weird o.O