1. Nearly 1/5 of the entire ocean floor has been discovered.
2. it is important that we map our ocean floors so that we understand more about our earth. Learning more about our earth can give us more information about life in the past.
Hope this helps :)
Number one, where are the sentences? Number two, where is the previous question? Number three, the correct term is 'which' not 'witch'. I will help you, but only if you correct the problems I have pointed about above. Thank you.
Well an expository essay is a writing peice that explains your topic or whatever you plan to write about and when you write you can really use any method but it has to sound right and feel right.
My best answer would most likely be a. Editing the language of your essay.
Editing the title is only a first impression and could be followed by a piece of writing lacking in flow. Editing punctuation would be my second choice, but it doesn't apply as much, in my opinion. And for the last choice, I'm pretty sure at least on of the three are practical options.