Answer:
require skills
Explanation:
There are various forms through which we can communicate to convey our ideas and information with others in a work place. Face to face conversation provides an advantage that we receives the non verbal clues.
Another way of conveying messages is writing letters or documents. One advantage of writing a letter is that it is convenient and simple. But the disadvantage lies in the fact writing an official letter requires skill and practice. Writing a letter requires proficiency in the written language which ensures conveying the ideas accurately through the words.
Hence the disadvantage in written documents is that it requires skills.