Answer:
Meredith can hold the university responsible for this incident.
Explanation:
Meredith was making a peaceful petition, which is protected by the First Amendment. In addition, the First Amendment defends free speech, which means that Meredith can defend the recreational use of marijuana, without being impeded. However, Meredith was prevented from making her petition within the university campus and this infringed on her right, so she can hold the university responsible for it.
Yes this sentence is a fragment. It doesn't have a predicate and sentences need to have a subject and a verb (predicate) in order to be complete.
Thesis definition: a statement or theory that is put forward as a premise to be maintained or proved
So,
Without having a recognizable thesis, your reader will not fully understand what point you are trying to get across. Furthermore, your writing will seem to have no meaning or purpose, and will not inform the reader. To clarify, if you do not have a recognizable thesis, your writing would be pointless.