[i] Block format is the most formal and widely used format. If you are unsure of what type of format to use, this is the best choice..
[ii] Semi-block has the power to shift elements to the right before they enter the paragraph. Standard block format is 5 by 7 inches (12..
[iii] Self-modified block, without any modifications, allows for very different things. If you plan to be working on multiple jobs at the same time, your block should look something like this : Add paragraphs to each page..
[iv] Semi-block stands for " top-and-left margins. " semi-block is used in many cases to correct any sections that look scratched while still being readable..Choose from options above and answer: What most naturally follows?

How to write an office letter
Decide what format you will be using.
There are three popular formats to use: block, modified block, and semi-block. Block format means that all elements of the letter are aligned to the left of the page, modified block allows for some elements to be shifted to the right, and semi-block is aligned left but each paragraph is indented.
Answer:
[i]