Answer: A. Often is modifying water which is the verb.
Explanation: :)
You have make a site that you know something about, and you have to make it useful.
Answer: Because maybe a teacher makes you do it for an assignment.
;D
Emerson's purpose is to argue that people need to avoid conformity. So the main point of that essay is that you do what you believe is right, rather than going with what society thinks.