"The number of paragraphs in letter may vary depending on the specific instructions for each task, but
in general one paragraph for
stating the reason, another for development of the subject, and the final one for other remaining points
given in task (as well as closing remarks) are needed."
All those sentences are now in one piece to help you picture the general snapshot of your letter. Now
can you choose the right choice in each
Pay attention to all choices in the gap as they are mostly some common mistakes made by other IELTS candidates.