You should capitalize "I" when you use it. That will help you get better grades.
Answer:
2.5% of sea water is salt
The purpose of exposition (or expository writing) is not primarily to amuse, but to enlighten and instruct. The objective is to explain and analyze information by presenting an idea, relevant evidence, and appropriate discussion. Its essential quality is clarity.
Answer:
A) It is almost midnight, yet I just can't seem to fall asleep.
Answer:
Using facts that are backed up by creditable sources, keep a level head; speak or type confidently, when trying to persuade someone don't be quick to correct them or talk over them. make sure you let them share their views and then if you can, rearrange your passage to best fit their ideas.
Explanation:
(trust me, as a student studying law for fun, we do this a lot.
Hopefully that was helpful to some extent.)