Since extensive writing is one that that is meant to be shared, you would pick an answer that you would be able to share and isnt personal. eliminate all three options except the one in which it isnt personal and you wouldnt mind it being shared. so writing an essay on a research topic is the answer.<span />
The best answer is: "writing an essay on a research topic".
Explanation:
An extensive writing is the one which brings up different sources and medias for the writing practice, besides being longer than the usual comments and note taking/making. It is important to highlight that all options could apply as correct answers in terms of how they could be developed (depending on the task given!). However, the best option between them is the essay because it is the longer one and whose development requires a lot more from the writer, such as by the use of arguments, examples, references, and more.
